从句时态
主句是过去式从句用什么时态
主句是过去式从句用什么时态
1.主句用一般现在时，从句可用任意时态，可归纳为“主现从不限”；
2.主句用过去时，从句用过去某个时态，可归纳为“主过从四过”；
3.主句用过去时，从句是科学真理、客观常识、名人格言时用一般现在时；
4.情态动词could/would用于“请求”，表示委婉、客气的语气时，从句不受主句的约束。
由引导词if或unless引导的状语从句叫做条件状语从句。
在英文中，条件是指某一件事情实现之后（状语从句中的动作），其它事情（主句中的动作）才能发生，通常译作“假如”。
注意：在含有条件状语从句的复合句中，表示将来时态，主句是一般将来时态，祈使句或情态动词，从句要用现在时态,[主将从现原则]（主将从现，将并非指将来时，还指表示将来含义的，跟着if后的那句话是从句。
语法引导条件状语从句最常用的连词是if,由if引导的条件状语从句表示在某种条件下某事很可能发生。
如：
1）If you ask him,he will help you.
如果你请他帮忙，他会帮你的。
2）If you fail in the exam,you will let him down.
如果你考试不及格，你会让他失望的
if引导的条件状语从句既可以将从句放前面也可以将从句放后面
（如果天下雨，我们就不玩了）If it rains,we will stop playing.
转为We will stop playing if it rains.。
从句中时态运用的注意点
until,as soon as, before, after,after as,than,whether,where 等 引导的从句
、由if引导的条件状语从句、关系代词和正式的演讲中。 下面我们小结下从句中时态运用的注意点。1.一般现在时 表示将来。当主句为将来时态或
：I’ll give you anything you ask for. 你要什么我都给你。You can have anythin
g I find. 我找到的任何东西你都可以拿去。Everyone who comes first will get a prese
nt. 每个先来的人都可得到一份礼物。2.一般过去时表示 现在①由if引导的虚拟条件句，要用一般过去时表示现在。 如：If I had
lots of money,I'd give some to anybody who asked for it. （NOT...who
would ask for it）如果我有很多钱，我将给任何找我要的 人。If I had the money now I’d bu
y a car. 假若我现在有钱，我就买辆小汽车。②宾语从句 中，由于时态呼应的关系，可用一般过去时表示现在。 如：I didn’t k
er when I'll arrive。我想知道什么时候我能到达。I don't know if I'll be here tomo
rrow.我不知道我是否明天在这儿。
全文完！
北京同声传译公司 ty19htvv
her until the plane takes off.我将呆在这里直到飞机降落。 She'll be on the same
宾语从句时态三大原则
宾语从句时态三大原则宾语从句时态三大原则是指：主句时态、主谓一致、语气一致。
1、主句时态原则：主句是一般现在时，宾语从句也一般用一般现在时；主句是一般过去时，宾语从句也一般用一般过去时；主句是将来时，宾语从句也一般用将来时。
比如：He told me he would come tomorrow. 他告诉我他将来明天来。
2、主谓一致原则：宾语从句的谓语动词与主句的主语保持一致，即如果主句的主语是单数，宾语从句的谓语动词也要用单数；如果主句的主语是复数，宾语从句的谓语动词也要用复数。
比如：She said she likes reading books. 她说她喜欢读书。
3、语气一致原则：宾语从句的语气要与主句保持一致，即宾语从句的语气必须和主句的语气保持一致。
如果主句是陈述句，宾语从句也应该是陈述句；如果主句是祈使句，宾语从句也应该是祈使句。
比如：He said to me: "Please come here." 他对我说：“请你到这里来。
”4、主句是一般现在时，宾语从句可以用一般将来时表示将来，表示推测、猜测或假设，即主将从现。
比如：I think he will come tomorrow. 我认为他将来明天会来。
5、主句是一般将来时，宾语从句可以用一般现在时表示将来，表示推测、猜测或假设，即主将从现。
比如：He will come tomorrow, I think. 我认为他明天会来。
6、主句是一般过去时，宾语从句可以用过去将来时，表示主句过去时发生时，宾语从句本来应该发生的事情，即主过从将。
比如：He said he would come tomorrow. 他说他将来明天会来。
7、主句是一般现在时，宾语从句可以用过去完成时，表示宾语从句发生在主句发生之前，即主现从过。
比如：She said she had seen him before. 她说她以前见过他。
8、主句是一般过去时，宾语从句可以用一般过去时或过去完成时，表示宾语从句发生在主句发生之前，即主过从过。
初中英语主句从句时态关系例句
初中英语主句从句时态关系例句宾语从句中，从句谓语动词的时态要与主句谓语动词的时态相呼应，主要体现在三个方面：1.主句的谓语动词是一般将来时、一般现在时或主句是祈使句时，从句的谓语动词根据实际情况选用具体的时态。
例如：It’s reported that Nanjing South Railway Station at the end of this month. （2011南京）A.has been completedB.is completedC.was completedD.will be completed此题中，从句的时间状语表示将来at the end of this month,主句又为现在时，故从句用将来时。
2.主句的谓语动词是一般过去时，从句的时态要相应地使用与过去相对应的时态，即一般将来时与过去将来时，一般现在时与一般过去时，现在完成时与过去完成时相对应。
例如：The woman asked the policeman where＿＿.（2011重庆）A.the post officeB.the post office wasC.is the post officeD.was the post office 这道考题中，主句动词时态用了过去时，故从句应由原来的一般现在时改为一般过去时。
另外，有必要注意两个特殊的词would和could，它们常出现在中考题中。
would和could 经常用于表示客气、委婉的语气，不表示过去，从句时态应根据实际情况而定。
例如：（1）—Excuse me,I want to go to the 21st National BookExpo(展览会).Could you tell me＿＿?—Sure.It is at No.3 Changjiang Road in Harbin.（2011哈尔滨）A.where it isB.where it wasC.where is it（2）—Would you please tell me＿＿?—At 10:00 this evening.（2010福建晋江）A.when will the train leaveB.when the train will leaveC.when does the train leave3.如果从句反映的是科学事实、客观真理、名言警句时，时态一律都是一般现在时，不管主句用什么时态。
when引导的时间状语从句时态规则
when引导的时间状语从句时态规则1. 嘿，你知道吗，when 引导的时间状语从句，要是主句是一般将来时，从句就得用一般现在时呀！就像“我明天要去北京的时候，我会给你打电话”。
2. 哇塞，when 引导的从句动作先发生，主句动作后发生的时候，那从句就得用一般过去时，主句用过去进行时哦！比如“当他昨天进来的时候，我正在写作业”。
3. 哎呀呀，要是主句和从句的动作同时发生，那 when 引导的从句和主句都可以用一般过去时呀！就像“当她敲门的时候，我打开了门”。
4. 嘿，想不想知道，when 引导的从句是进行时态，主句是一般时态的时候，那从句得用延续性动词哦！比如说“当他正在看电视的时候，我回来了”。
5. 哇哦，when 引导的从句表示“就在那时”，那从句常用一般过去时，主句常用过去进行时或 was/were about to do 等，就像“我正在走路的时候，突然下雨了”。
6. 嘿，注意啦，当主句是过去进行时，从句是一般过去时，那这个时候 when 就像个小开关呀！比如“当我正在睡觉的时候，电话响了”。
7. 哎呀，要是 when 引导的从句表示一个新的情况发生，那从句就用一般现在时或现在完成时呀！就像“当他到达的时候，我们已经准备好了”。
8. 哇，when 引导的从句如果描述过去习惯的动作，那从句得用一般过去时呀！比如“当他小时候，他经常去河里游泳”。
9. 嘿，这里要记住哦，when 后面接瞬间动词的时候，就有特别的时态规则呢！就像“当门铃响的时候，我去开门”。
10. 哇塞，你看，这就是 when 引导的时间状语从句时态规则呀，是不是很有趣呢！就像“当我看到他的时候，我高兴极了”。
结论：这些 when 引导的时间状语从句时态规则真的很重要呀，掌握了它们，我们就能更准确地表达时间关系啦！。
各种从句的时态
五、定语从句 定语从句的时态取决于从句描述内容的发生时间。
如：People who take exercise live longer. 进行体育锻炼的 人活得长些。在这里，进行体育锻炼指的是日常活动，经 常性运动，所以从句取一般现在时。 He is the man whose car was stolen. 他就是汽车被窃的 那个人。在这里，汽车被盗，是过去发生的事，所以其从 句取一般过去时的被动态。
我不会去北京的，除非公司为这次出行付款。
二、宾语从句：主过从过 在含有宾语从句的复合句中，当主句的谓语动词为过去时态 时，从句也指过去做过的事情时，须用表示过去的某种时态。 例如： He asked when they would go to the party. 他问他们什么时候将去参加聚会。 Miss Green said she had been to Beijing before. 格林小姐说她以前曾经去过北京。
三、宾语从句： 在宾语从句中，当主句的时态为一般现在时、现在进行时、 现在完成时等时态时，后面从句时态不受主句限制，可根据 情况，选用各种适合的时态。
例如： Do you know when we'll have a football match? 你知道我们什么时候举行足球赛吗？ You know he has gone to Shanghai. 你知道他已去上海了。
一、时间状语从句、条件状语从句：主将从现
在以when，after，as soon as（一……就）等引导的时间状语 从句以及以if，unless（除非）等引导的条件状语从句中，如果 主句和从句都是指将来，当主句用一般将来时，从句则用一般 现在时。 例如：
I‘ll tell her the good news when she comes back. 当她回来的时候，我将把这个好消息告诉她。 If it doesn’t rain, he will come here on time. 如果不下雨，他会按时来这儿的。 I will not go to Beijing unless the company pays for the trip.
高中英语从句时态8种基本时态归纳
高中英语从句时态8种基本时态归纳
以下是高中英语从句中8种基本时态的归纳：
1. 一般现在时：表示现在经常发生的动作或存在的状态。
在时间状语从句和条件状语从句中，经常使用一般现在时代替将来时。
2. 现在进行时：表示正在进行的动作或存在的状态。
在时间状语从句和条件状语从句中，有时会使用现在进行时代替将来时。
3. 一般过去时：表示过去发生的动作或存在的状态。
在时间状语从句和条件状语从句中，过去时通常使用一般过去时代替。
4. 过去进行时：表示过去某个时刻正在进行的动作或存在的状态。
在时间状语从句和条件状语从句中，过去进行时有时会代替过去将来时使用。
5. 现在完成时：表示已经完成的动作或存在的状态，强调对现在的影响。
在时间状语从句和条件状语从句中，现在完成时可以代替将来完成时使用。
6. 过去完成时：表示在过去某个时刻之前已经完成的动作或存在的状态。
在时间状语从句和条件状语从句中，过去完成时可以代替过去将来完成时使用。
7. 一般将来时：表示将来要发生的动作或存在的状态。
在时间状语从句和条件状语从句中，有时会使用一般将来时代替。
8. 将来进行时：表示将来某个时刻正在进行的动作或存在的状态。
在时间状语从句和条件状语从句中，将来进行时可以代替将来完成进行时使用。
需要注意的是，这8种基本时态的具体用法可能会因语境和表达方式的不同而有所变化，需要结合具体语境进行理解和应用。
since从句的用法时态
千里之行，始于足下。
since从句的用法时态
since从句的时态通常根据主句的时态来确定。
以下是一些常见的情况：
1. 如果主句使用一般现在时，since从句通常使用一般过去时或现在完成时。
例如：
- I have been studying English since I was a child.（主句：现在完成时，since从句：一般过去时）
- He has been living in London since he graduated from university.（主句：现在完成时，since从句：一般过去时）
2. 如果主句使用一般过去时，since从句通常使用过去完成时。
例如：
- I had known her since we met in high school.（主句：一般过去时，since从句：过去完成时）
- They had been friends since they moved to this town.（主句：一般过去时，since从句：过去完成时）
3. 如果主句使用现在进行时，since从句通常使用一般过去时。
例如：
- She has been working late recently since she started her new job.（主句：现在进行时，since从句：一般过去时）
- They have been traveling a lot lately since they got a long break.（主句：现在进行时，since从句：一般过去时）
需要注意的是，这只是一般的规则，具体情况仍要根据上下文来确定。
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主句从句时态
可以存在主句是一般过去时，从句是现在完成时的情况的。
原因如下：当从句表示客观事物或真理，或人们已经公认的道理时，其时态不受主句谓语动词的时态的影响。
即使主句谓语动词使用了过去时的某种时态，从句的时态仍然是现在的某种时态。
当然一般情况下，主句是一般过去时，从句一般也应该是过去时态的。
下面是我找到的考研有关主从句时态的一些资料，请参考。
附：主从复合句中主句和从句之间时态的一致关系。
(1)在宾语从句中主句和从句之间的时态的一致关系，通常由主句谓语的时态决定从句谓语的时态。
A.若主句谓语动词是现在时或将来时，如：一般现在时，现在完成时，一般将来时，将来完成时等，从句可以根据需要使用任何时态。
B.若主句谓语动词是过去时态(一般过去时，过去进行时，过去完成时，过去将来时，过去将来完成时)，从句谓语动词也必须是过去时态。
a.如果从句动作与主句动作同时发生，从句用一般过去时或过去进行时。
b.当从句动作发生在主句动作之前，从句要用过去完成时。
c.当从句动作发生在主句动作之后，从句要用过去将来时。
C.当从句表示客观事物或真理，或人们已经公认的道理时，其时态不受主句谓语动词的时态的影响。
即使主句谓语动词使用了过去时的某种时态，从句的时态仍然是现在的某种时态。
D.当从句表示并未出现或尚未实现的愿望时，必须用过去时态。
E.有些形容词后面可跟有从句，这种从句一般可看作宾语从句，其谓语也应与主句谓语的时态保持一致。
可跟这种宾语从句的形容词有：afraid, glad, sure, confident, sorry, certain, conscious, aware等。
一致的原则与宾语从句相同。
例如：I’m confident that I’ll pass the exam.我有信心通过考试。
He was lucky that he wasn’t killed.他很幸运没有被杀死。
(2)在主语从句，表语从句和同位语从句中，主句和从句之间的时态一致关系所遵守的法则和宾语从句相同。
从句时态与主句时态的用法
从句时态与主句时态的用法从句时态与主句时态的用法语法上来说，从句时态与主句时态应该保持一致。
但实际中，有些特殊情况下，从句时态可以与主句时态不一致。
下面是详细解析：一、从句时态与主句时态一致从句时态和主句时态一致，表示时间和动作发生的时态一致。
这种情况是最常见的，也最符合语法规则，用来表达客观事实时会比较准确。
1. 过去式主句：昨天我想了很久，后来终于知道了正确答案。
从句：我一直认为答案是A，可是事实证明它是错误的。
2. 进行时主句：我现在很累，想休息一下。
从句：我正在考虑要不要去散步，放松一下自己。
3. 将来时主句：我下个月要去旅游，计划很充实。
从句：我想好了行程，希望你能跟我一起去。
二、从句时态与主句时态不一致像虚拟语气和间接引语等特殊用法，从句时态可以和主句时态不一致，这种情况语法上也是被允许的。
下面是具体解析：1. 虚拟语气虚拟语气表示假设、愿望或建议等情况下，用来表示虚拟的情况。
这种情况下，从句时态与主句时态不一致通常应该这样用：1) 主句为过去时或将来时，从句用“should+动词原形”或“动词原形+were”。
例如：主句：如果我昨天有时间，我会去参加你的生日派对。
从句：我希望你应该知道，我一直很想参加你的生日派对。
2) 主句为现在时，从句用“would/could+动词原形”。
例如：主句：如果我明年有钱，我就去留学。
从句：我希望我可以去学习更多的知识，成为一个更优秀的人。
2. 间接引语间接引语是根据别人说过的话来间接表达自己的想法。
这种情况下，从句时态与主句时态通常不一致。
主句：老师说，小明今天生病了。
从句：他说他头疼得厉害，然后就病倒了。
综上所述，从句时态与主句时态一致是最符合语法规则的用法，而在虚拟语气和间接引语等特殊用法下，从句时态与主句时态不一致也是可以被允许的。
正确使用这种句型可以使文章更加精准，表达意思更加清晰。
状语从句中的时态对应
主句谓语动词为现在时态，则从句动词可根据需要使用任何时态；其中有如下几种从句的时态一般是过去范畴的时态，主句谓语动词为过去时态，情况要注意：当从句的动作与主句的动作同时发生，从句中一般用一般过去时或过去进行1.
时。从句的动作发生在主句动作之后，从句时态用过去将来时。2.
3.从句的动作发生在主句动作之前，从句时态用过去完成时。
一般过去时It was (wasn't) +时间段/ long + before +
北京，34)(2008I'm sorry you've been waiting so long, but it'll still be some time ____ Brian gets
back.D. after C. till A. before B. since
)(2002上海He will have learned English for eight years by the time he______ from the university
next year.
D. is to C. graduates B. will have graduated A. will graduate
不管他们是谁，我都不会让他们进来。14)2008(全国Ⅱ，If their marketing plans succeed, they ____ their sales by 20 percent.D. would be C. have increased A. will increase B. have been increasing
他在离开教室之前关上了门。We had been to four citiesbefore he came to join us.他来加入我们之前我们已经去了四个城市了。
英语语法 时态 语态 从句大全
英语语法：句型时态一、一般现在时：1.概念：经常、反复发生的动作或行为及现在的某种状况。
2.时间状语：always，usually，often，sometimes，every week （day，year, month…)，once a week，on Sundays,3。
基本结构:动词原形（如主语为第三人称单数，动词上要加（e）S）4.否定形式：am/is/are+not;此时态的谓语动词若为行为动词，则在其前加don't,如主语为第三人称单数，则用doesn’t，同时还原行为动词。
5。
一般疑问句：把be动词放于句首;用助动词do提问，如主语为第三人称单数，则用does，同时，还原行为动词。
6。
例句：。
It seldom snows here。
He is always ready to help others.Action speaks louder than words。
二、一般过去时：1。
概念：过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。
2。
时间状语：ago，yesterday, the day before yesterday，last week（year, night，month…），in 1989, just now，at the age of 5，one day, long long ago, once upon a time, etc。
3.基本结构:be动词;行为动词4.否定形式：was/were+not；在行为动词前加didn’t，同时还原行为动词。
5。
一般疑问句：was或were放于句首;用助动词do的过去式did 提问,同时还原行为动词.6.例句:She often came to help us in those days。
三、现在进行时：1.概念：表示现阶段或说话时正在进行的动作及行为。
2。
时间状语:now, at this time，these days, etc。
(完整版)初中英语从句时态
1. 宾语从句：1 . 主句假设是一般现在时, 从句根据实际情况用适当时态.He says 〔that〕 he will have a walk soon.The teacher asks who is the cleverest in the school.I want to know who came here late this morning.2 .主句假设是一般过去时,从句也要用过去时.He wondered if I would come. She told me that her son had got well.She said that she liked watching TV. We thought Jim was wrong.3 .无论主句是何时态,从句假设表客观真理,要用一般现在时.Mr. Li said the moon is smaller than the earth.4 宾语从句无论有何引导词,都要用陈述句语序.Could you tell me when you will get back to Wuhan?〔不是will you 〕Do you know which sweater she is wearing? 〔不是is she〕2.状语从句：1 主句假设是一般将来时、祈使句或含不表过去的情态动词等,那么if〔如果〕,unless〔除非〕,when〔当•…的时候〕,as soon as「…就•••〕, before, after, until, till, as〔当••的时候〕所引导的状语从句用一般现在时.You may take a rest when you finish doing your work.I will call you up if I leave for Shanghai next week.Wait for your brother at the bus station until he arrives.2 而主句假设是一般过去时,从句也要用过去时,如：I would give the money to the charity if I had a million dollars.When he got to the park, his classmates had left.My son ran towards me as soon as he saw me on the street.3 .定语从句：关系代词who 只指人, which 只指物. that既可指人又可指物. whose 后必须跟有名词,既指人,也可指物.关系词作主语时,不可省略, 作宾语时可省略. whom只指人, 只作宾语. 关系副词where 指“在那里〞, when 指“在那时〞.She is a girl who/that is beautiful and kind-hearted.She is a girl (who/whom/that) I know very well.That boy whosehair is very long is my brother. ( 所属)The girl whois tall is my sister. / I own a bike whoseprice is high.I bought a watch (which/that) I paid 100 yuan for. (指物)I prefer a place which/thatis clean and quiet.I prefer a place whereI can live a quiet life. (在这儿)I shall never forget the day whena boy helped me find my dog.4 .wish 和hope:1wish 可接to do sth. /sb to do sth. /that从句.I wish to spend my summer holiday in Qingdao.I wish youto join my party this Sunday.I wish (that) I could be a scientist.2hope 接to do sth. 或that 从句. 但不接sb to do sth.I hope to receive a letter from you some day.I hope 〔that〕 everything goes well. /I hope you will get well soon.5 .thanks for 和thanks to: Thanks for your helping me with the work.〔表达对对方为自己做了某事的感谢, 后无补充的结果. 〕Thanks to your suggestion, I didn ’ t make such mistakes.〔表达感谢由于某方所做的有利的事,出现了后面的结果. 〕6 .感官动词用法之一：see, hear, listen to, watch, notice,feel 等词,后接宾语,再接动词原形/ 动词ing, 分别表示全过程和正在进行.句中有频率词时,以上的词也常跟动词原形.I heard someone knocking at the door when I fell asleep.〔正进行〕I heard someone knock at the door three times. 听的是全〔过程〕I often watch my classmates play volleyball after school.〔频率词〕假设以上词用于被动语态, 后面原有动词原形改为带to 不定式：We saw him go into the restaurant with his wife. fHe was seen to go into the restaurant with his wife.7 .感官动词用法之二：look, sound, smell, taste, feel 可当系动词,后接形容词. He looks . It sounds good. The flowerssmell beauti l. The sweets taste sweet. The silk feels soft. I felt tired.这些动词不用于被动语态. The sweets are tasted sweet.是错误的.注意：如果加介词like, 那么后不可接形容词, 而接名词或代词：He looks like his mother. That sounds like a good idea.It smells like a flower. It tastes like salt.8 .find 和think 局部用法: + 宾语+ 宾语补足语. 〔代替宾从〕宾补有以下情况：1.名词短语, John found his son a cleverboy.2. 形容词短语, Mrs. Smith thinks her husband kind of lazy.3.有时宾补后可接带to 不定式, I found it hard to fool thegirl.9.would like/want/feel like: 1 would like ,和want 类似：◊者B 可接名词短语：I would like/ want another three desks. ◊都可接带to 不定式：I would like/ want to go out for a walk.◊都可接sb,然后再跟带to不定式:I would like you to give me a hand.2 feel like: ◊后也可接名词短语：Do you feel like sometea?◊后假设接动词,须用动词ing形式：Do you feel like having a walk? I don ’ t feel like drinking【tfeeae.l like 常用于疑问句或否认句中.】10.词序易错的短语： 1 形容词修饰不定代词或不定副词,形容词在后面. Is there anything delicious in the fridge?Nothing serious. There is something wrong with the computer.I want to go somewhere warm.2 else修饰疑问词和不定代词、不定副词,也放在后面.What else can you see in the picture? Who else is in the room?Do you have anything else to say? Where else can you see it?3 enough 修饰形容词和副词, enough 放在后面.This sweater is cheap enough. Nemo is old enough to work.He ran fast enough to catch up with the dog.11 . 对“ 评价〞、“ 天气〞的提问之区别：1What do you thinkof …？=How do you like …你对••怎么看？"〔How ?句中有like,是动词.〕2What ' s the weather like in …？ = How is the weather in …？的天气什么样？"〔What ••旬中有like,是介词“像〞. 〕12 .take, cost, pay, spend 区另fj：13 It + take + sb + some time + to do sth.It took us half an hour to cut down the tree.14 物+cost+sb+钱：The bag cost me thirty yuan. (cost, cost, cost)假设cost 后无sb, 那么译作“价钱是〞：The bag costs 30 Yuan.15 人+ pay +sb + 钱+ for sth: I paid the seller 200 Yuan for the bike. (pay, paid, paid). (pay 后所加内容可视具体情况取舍. )16 人+ spend + 时间/ 钱+ on sth / (in) doing sth.The girl spent two hours (in) searching the Internet.The girl always spends much money on her clothes.spend 有时可指“度过〞：spend holiday/ weekends/ winter17 .双宾结构：pass/ give/ teach/ offer/ lend/ send/ sell/ call/show/buy/ask/ tell/ build 等可加双宾结构.即后接sb + sth.其中pass, give, offer, lend, send, sell, show等可接sth + to sb.buy, build 等可接sth + for sb.另外,假设sth 是代词时,不用双宾结构.Please pass it to me.18 .局部词作连词与介词：〔连词接句子,介词接名词或代词〕Keep care l when you are listening to the teacher. 〔连词〕Keep care l when listening to the teacher. 〔介词〕类似的, while, than, before, after, as, since, until 等.如：I ’ ll wait until I hear from her. 〔连词〕I ’ ll wait until next Friday. 〔介词〕19 .动词ed与动词ing作形容词用法之一:1.动词ed作形容词：表示被动或已发生,常作定语. The boy named Peter ismy friend.那个叫做彼得的男孩是我的朋友. 划线局部起修饰作用,下同.He’ s eating fried chicken. 他在吃炸鸡. There is no timeleft.I have read a novel writtenby Lu Xun. 我读了一部鲁迅写的小说.He lives in a house builttwenty years ago.2. 动词ing 作形容词：表示正进行或功能,常作定语.the ing boy, a running bus, the rising sun, a bus running on the road, the boy ing in the corner 〔正进行〕a sitting room, the sleeping car, the bathing suit 〔功能〕16 .动词ed与动词ing作形容词用法之二：和心理感受有关,但ed 修饰人, ing 常修饰物. I felt surprised at his words.How exciting the film is! / I want to go to a place which is relaxing.17 .动词ing 和带to 不定式作主语：To be a teacher is my dream. Working hard brings you success.Taking care of our environment is very important.To plant trees makes me happy. 〔谓语用单数〕Reading books gives you knowledge. 〔谓语用单数〕Listening and writing are both difficult. 〔谓语用复数〕1.1 later / after / ago /before: llater 时间后〞结构：时间段+later常用于一般过去时. They went to Beijing five days later.〔later 单独在句尾,常用于将来时：I ’ ll see you later.〕2after “时间后〞结构：after+时间段,常用于一般过去时,和1 相同. They went to Beijing after five days.〔after 也可加句子：I’ ll send you an-me ail after I gethome. He found out the information after he hadsearched the Internet for thirty minutes.〕3ago 〞♦・时间前〞结构：时间段+ago,用于一般过去时. The Greens moved to Shanghai four weeks ago.〔since +时间段+ago,主句用现在完成时〕4before 单独放在句尾,常用现在完成时：“以前〞I have been to London before. He has seen the film before.〔假设是时间段+before,那么常用过去完成时,译为“…时间前〞：I had seen the film two weeks before. We had found out the answer to the problem an hour before.〕19 .四季：spring 春；summer 夏；autumn 秋；winter 冬; season季20 .月：January, 一月；February, 二月；March, 三月；April, 四月；May, 五月；June, 六月；July, 七月；August, 八月；September, 九月；October, 十月；November, 十一月；December, 十二月.21 . 星期：Sunday, 星期日；Monday, 星期一；Tuesday, 星期二；Wednesday, 星期三；Thursday, 星期四；Friday, 星期五；Saturday,星期六.Sunday为第一天,Saturday为最后一天.22 . “也〞：either, 用于否认句的末尾. also, 通常挨着动词, 少用于句尾. too, 通常在句尾, 前常有逗号. as well, 只用于句尾.注意：后三个词都不用于否认句.23 .带to 不定式用法之一：带to 不定式有逻辑宾语在前时, to 后动词用及物动词, 不及物时需加介词. The apples aretoo tall for the boy to reach. /The zoo is not a good place for animals to live in.24 .(a) little / (a) few: 1few , little 几乎没有；少“〞否认词.few 加可数名词复数, little 加不可数名词. 2a few 一些“ 〞肯定词,加可数名词复数; a little 一些；一点“ 〞也是肯定词,加不可数名词. 3 另外, 在too, very, so 等词后用few, little; 在only,just, still 等词后用 a few, a little. 而quite a few/ a little 译为“很多〞25 .及物动词+副词：put on/off/away/up/down/out; break off/down;turn on/off/up/down; get back; use up; give away/out/up/back; try out/on; ring/call up; let down; clean up/out; set up; think up; hand in/out; fix up; work out; ;dress up;pick up; help out;keep off/out/down cut down; write down; wake up( 叫醒);take off/away; sell out; look up/over; eat up; throwaway/off宾语是名词时,可放在中间或后边,是代词时只放在中间.26 .as ..... as用法：1 和--- i样…His room is as big asmine.He runs as fast as I /me 2as …as possible/sb can^可“台匕〞目匕…We went there as soon as possibl磁们尽可能快地去了那儿. Listen to the teacher as carefully you can. 3 有些短语有几个意思：as soon as和--- 样快；一…就•…；as much a/口…一样多；多达；as long as和-- 样长；长达；只要；as well as和---- i样好；和--- i样；as far as远达；就,…来说；27 .prefer 用法：prefer sth/doing sth to sth/doing sth 比起•… 更喜欢…prefer to do sth rather than do sth 宁愿•…也不愿…prefer to do sth / prefer doing sth 更喜欢做某事28 . some-, any-, every-用法：1some-某〜,一些〜工用于肯定的陈述句中. I have something to tell you. Maybesomebody has taken it. 假设用于疑问句中表示期待对方肯定的答复或表示请求或建议. Why not ask somebody to help you?Shall we give him something to eat? What about some milk?Could you please lend me some chairs? 2any-, 在疑问句中仍译为某〜,一些〜 " Do you have anything to say Is anybody in thehouse?在肯定句和否认句中译为任何〜" You may putthe box anywhere in the room. He is taller than any other student in the class. We don ’ t have anything to eat this morning. 3every-每〜〞,强调所有,既包括此也包括彼.Is everybody here？-No, Tom and Lucy have asked for leave. The glass was broken, and the water went everywhere.29 .动词时态和形式：八个时态：一般现在时、现在进行时〔am/is/are + v.ing〕、一般将来时〔will/shall/be going to+ 动词原形〕、一般过去时、过去进行时〔was/were +v.ing〕、现在完成时〔have/has + v. 过去分词〕、过去完成时〔had + v. 过去分词〕、过去将来时〔would + v. 原形〕六个形式：原形；过去式；过去分词；第三人称单数〔加s/es〕;现在分词〔v.ing〕;带to 不定式.30.if/whether 区别：if 如果〔引导条件状从〕 / 是否〔引导宾从〕whether 无论〔引导让步状从〕 / 是否〔引导宾从〕都译为是否"时,whether可接or not,也可接带to不定式.if那么不可.另外,if可接any-单词,常不接some-单词.If you have any water, please give me some.31.由于：because, 常是对why 的答复,语气最强.since,位置：Since …,….Since it ' s already late,Strgu now.for, 位置：…,for …语气最弱.I drove carefully, for it snowing.as有时也指由于工用法根本无限制.32.表推测：must, may, might, can, could, can ’tmust 〞定" 可能性最大,常用于肯定句.There is the door bell, it must be Tom.may / might也许〞一般用于肯定句, may比might可能性大.She is coming to us. She might be our new teacher.can / could可能" coulct匕can语气更委婉.但can多用于否认.You could be right, but I don ’ t think you are.The light in the office is off. The teacher can ’ t be therenow.33.so与such区别：so是副词,后跟形容词/副词,so tall/slowly …such 是形容词,后跟名词短语. such bad weather / good news…；such a beautiful girl / an important lesson / a heavy stone …；such kind boys / new desks / friendly people / amazing movies …；假设名词前形容词是many, much, few, little 时,不用such,而用so.so many flowers / much rain / few friends / little water …也常有“so / such•••tha向型,译为如此•…以致于...〞34.so的另两个用法：1so + be/情态动词/助动词+主语,也〞上下文所指不是同一个人或物. The twins are working, soam I.I will stay up tonight, and so will Peter.以及对话形式：A: I woke up late this morning. B: So did I.2so +主语+ be/情态动词/助动词,确实…是"上下文所指是同一个人或物. A: We have lunch at school. B: So you do.又如：A: Bruce can work out the problem. B: So he can.35.neither/nor 用法之一：neither/nor+ be/情态动词/助动词+主语“•也不〞上文是否认句.She didn t get well, nor did her brother.或对话形式：A: Jim hasn’ t had breakfast. B: Neither have1.36 .keep, make, get,have 用法：Ikeep + sb/sth doing sth 让…旦直做•♦" I ' m sorry for keeping you waiting so long. keep + doing sth 坚持做某事“〞2make + sb/sth do sth 让…做某事I ' ll try to make you understand what I mean. I feel sorry that I have made him wait for long.3get + sb/sth to do sth让••做某事.He got Peter to buy him a pen.4have + 宾语+ 动词原形/ing /过去分词Have him do it, please.让他做它吧.We had the machine working.我们让那台机器一直工作着. We had the machine repaired.我们让人修理了那台机器〔让那台机器被修理了〕.5 也都可接形容词：keep safe/busy, keep the doorclosed/open,make us happy, get the door closed, have everything ready.37 .used 短语：used to + 动原, 过去常常" He used to smoke.be used to译为被用来…〞,后接动原.It is used to cut things.be used to译为习惯于•••〞,后接动词ing或名词/代词.如：He’ s used to working late. / We are all used tofollowing others.be used for +目的〔名词或动词ing〕如：English is used for business./Knives are used for cutting things.38 . through/past/across: 都可作介词, “穿过〞前常有位移动词.He climbed through the window and saw what he could take away.He went past me without saying any words.He swam across the river. 【through,内部;past,旁边; across 外表.］位移动词+ past相当于动词pass;位移动词+across相当于cross.39 .the number of / a number of:前者〞•的数量〞；后者“许多的〞都跟可数名词复数.前者作主语,谓语用单数；后者作主语, 谓语用复数. The number of the trees is two thousand. 用单数is.A number of trees have been cut down用复数have.40 .延续性动词：How long , since, for, 〔以上见84〕until/till等所在肯定句中的主句谓语要用延续性动词.How long may I keep this novel? I ’ ve lived here since 2002.Let ’ s waitnutil he comes back.. 但否认句中可用短暂性动词：I haven ’ t seen you for a long time.41.all/each/both/none/either/neither:1All boys/All of the boys are from China. all 接可数复数, 谓语也用复数. All of the water is polluted. 假设接不可数, 谓语用单数.2Each boy/Each of the boys has a different bag. each 接名词单数或接of + 限定词+复数,后谓语都用单数.3Both of the twins are clever. 后面谓语用复数.4None of the students has/have been there before.none +of +限定词+复数, 谓语用单、复数都可.另见885-When shall we meet, Saturday or Sunday?-Either day is OK. / Either of the days is OK. 谓语用单数.6-When shall we meet, Saturday or Sunday?-Sorry, I have to look after my mother these two days. That is, neither time is OK. / neither of the days is OK. 谓语用单数.all/each/none分别指三者或更多中的都〞/每〔个〞/没“有一个〞. both/either/neither 两者中“都〞/任何一个“〞/没有一“个〞42 .计量表达法：数量+单位+形容词.The building is twenty meters tall./ The street is forty meters wide.The fish is five kilos heavy./ This baby is only six months old.假设计量表达的后面跟有名词,那么要用连字符,单位不用复数.They dug an eight-meter-deep hole. /. I bought a 10-kilo-heavy fish.It ’ s a piece o-fm2eter-thick ice. / They built a 50-meter-wide street.It ’ s a tw-moonth holiday. 〔此处计量中的形容词long 可省略. 〕43 . Must I/ May I / Need I 用诲.IMust I …我必须…吗？A: Must I finish the work? B: Yes, you must. / No, you needn’ t.2May I …?我可以…吗？A: May I go out for a walk now?B: Yes, you can. / No, you mustn ’ t/can ’ t.3Need I…?我有必要…吗？A: Need I clean the house? B: Yes, you must. / No, you needn’ t.44 .hundred/thousand/million/billion: 前有具体数字, 不加s 及of. 否那么加s, 加of. 如：thousands of trees; many millions of people.nine hundred people, ten thousand student算.但前假设有several,后常不力口s和of： several million pounds45 .反意疑问句〔QT〕局部用法/something, nothing, anything, everything 作主语, QT 主语用it.Something is wrong, isn ’ t it? / Nothing is cduiflfti, is it?46 t hink Lucy can do well in the exam, can ’ t she?I don ’ t think he will come here on time, will he?QT 要结合think 后的从句而定.3 祈使句的QT一般用will you? 而Let' s 用shall we?Get up now, will you? Don ’ t be noisy, will you?Be quiet, will you? Please don ’ t talk, will you?Let us do it now, will you? Let ’ s do it now, shall we?4There be 句型,QT 主语用there.There is a man working in the field, isn ’ tthere?There used to be a meeting on Friday, didn ’ tthere?There won’ t be a movie in the theatre, wltilhere?46.put on, wear, dress, in: 1put on, 穿上〞后接物. “ 表行为,是短暂动词. You should put on your coat when you leave.2wear, “穿,穿着〞后接物,表状态,是延续性动词. He always wears the yellow sweater in winter. /I like wearing beautiful clothes.3dress, 给“••穿衣〞后接人.You can dress yourself, baby.Lucy is dressing her little brother now.be dressed in后常接具有某种特征的衣物.The lady is dressed in a white skirt / white. 可直接加表颜色的词.4in, 穿着“ 〞后接具有某种特征的衣物,表状态,是介词,不可作谓语,可作状语. The woman in a white skirt is myteacher.Do you know the girl in a r ed coat? I ’ ve seen the boy in yellow.47.虚拟语气局部用法：在非真实条件句中要用虚拟语气, 即if 从句中用一般过去时, 而主句动词用would/should+动词原形,表示与现在相反的主观设想,也可以表示在说话人看来实现的可能性很小的情况. 〔注意：虚拟语气中的be动词都要用were.〕If there were no air, people would die. 〔与现在事实相反〕If I got rich, I would travel around the world. 〔可能性很小〕48.other/others/the other/the others/another:1 如果不特定指出哪一个, 是泛指, “ 另一个〞要用another,后加可数名词单数. If you are still thirsty, you may haveanother cup of tea.〔没特定指出哪——杯茶, 是泛指. cup是单数.〕another 也可+数字+可数复数：The meeting will last another two hours. / We need another six desks.2 如果只有两个或只有两局部,就给出了范围,其中另一个或另一局部是特指〔other前有the.〕,有如下用法：第一种,所说内容只有两个：Mrs. Green has two sons, one is interested in math, the other 〔one / son〕 is good at science. 【只有两个,用the other,不加s, 后面名词可省略. 】又如：This pair of shoes is strange.One is blue, yet the other is green. 这双鞋子很怪,一只蓝色, 而另一只绿色.第二种,只有两局部：此种情况下the other后接可数名词复数,或不接名词而只在the other后加s. Two fifths of thestudents in our class are boys, the other students are girls / the others are girls. Two children went, but the others stayed.〔其他孩子都留下了.〕3 如果没有显示出只有两局部, 未给出范围, 那么是泛指,不加the.Lei Feng liked helping other people / others.Have you any other questions?Alice didn ’ t like that dress, so she asked to see some others.4other 的另一用法：用比拟级的形式,表达最高级的含义.He is taller than any other boy in his class. 〔划线中boy 用单数〕=He is taller than all the other boys in his class. 〔划线中boy用复数)他比班里任何男孩都高〔他是班里男孩中最高的〕.49 .how long/how often/how soon/how far: 1how long 是对长度或时间段提问. How long is the river? - It ’ s 5,000 kilometers long.How long have you lived there? -For five months. / Since 2002.2how often 是对频率提问,如：never, sometimes, often, usually, always, once a week, twice a day, three times a year, every day 等.How often do you watch TV? -Every two days. / Twice a week.【假设只有次数,那么用how many times 提问：How many times do you watch TV a week? -Twice. / only once.】3how soon 是对“ in +时间段〞提问：-In a week./ In two How soon will you return to Beijing?days.4how far是对时间段's + walk/ride/drivegK计量表达提问.-How far is it from your home to the school?-Five minutes ’ walk. /An hour ’ s ride. /Thirteen minutes drive.或者说：It s about 20 kilometers 〔far〕 away.〔问和答复不同.〕50 .分数表达：二分之一: half a/an 或a half. 如：half an hour= a half hour 半小时It ' s half past sevenJ略冠词〕以下情况中, 分子〔基数词〕假设超过一, 分母〔序数词〕需加s：三分之一: a /one third 三分之二: two thirds四分之一: a/one fourth 或a/one quarter四分之三: three fourths 或three quarters.五分之一: a/one fifth 五分之二: two fifths 其它类推.假设分数所在of 短语作主语,谓语依of 后的名词而定：Two fifths of the students are on time. (指名词复数时,谓用复) Two fifths of the land is polluted. ( 指不可数时, 谓用单)51 .到达：1get to + 地点get to Shanghai/London/China接地点副词时,不带to. get there/home/here.2arrive in+ 大地点(Beijing/Zhengzhou) , arrive at+小地点(school/hospital), arrive 只作不及物动词. 所以也可单独用：Please ring me up when you arrive.reach 只作及物动词,后直接加地点：reachBeijing/England但常不说reach home/there/here.52 .感慨句：What + 名词短语+主语+谓语！What lazy boys (they are)! What hard work! What good news!What a good idea! What bad weather (it is)! What a pity!How +形容词/ 副词+ 主语+ 谓语！How hard the work is! How fast he runs! How rude you are!How carefully they are listening! How bad the weather is!53.because/ instead / out等与力口of 的区别：1because 后接句子, because of 接名词或代词.He didn ’ t come because he was ill. / because of his illness.2instead是副词,单独在句尾.instead of还要接名词或代词.We didn’ t have rice, we had noodles instead. / instead of it.3out副词,可单独用,但假设接地点,先加of.〔也可作介词,向…外〞,可不加of. 一般不要求掌握.〕He went out early. 或He went out of the house early.54 .too much, too many 与much too:much too过于工加形容词或副词原级. much toobig/slowly 等.too much “太多的〞,加不可数名词. too much work/rain 等.too many 太多的“,力口可数复数. too many books/people 等.55 . alone / lonely: 1alone, 单独一人；单独“〞不含感情色彩.可当形容词,但只在系动词后作表语：Jack is alone. 杰克是单身.The old woman is alone in the house. 那位老妇一个人在屋里.可当副词,修饰动词：She lives alone. 她独居.Can you move the stone alone? 你能单独搬动那块儿石头吗？Dick is walking on the beach alone. 狄克单独在海滩漫步.〔注意：不可说very alone. 但可说very much alone. 是特例〕2lonely, 孤独的；寂寞的“〞带有伤感色彩.只当形容词.可在系动词后作表语：The old man is lonely.这位老人是孤独的.He has many relatives, but he feels lonely. 他有很多亲戚,但感到孤独.〔lonely 和心理感受有关,而alone 和心理感受无关.〕也可在名词前作定语： a lonely person 一位孤独的人a lonely village 一个偏僻的村庄〔alone不可作定语〕56 .belong to 与be: This suit belongs to me /Lucy /my brother. 〔人〕This suit is mine /Lucy ’ s /my brother ’〔某物是某s /hers. 人的〕57.by 常见用法：1“通过〞I study English by memorizing grammar. You can know it by looking it up in a dictionary.He travels by bike.2“ 截止到〞Will you finish the task by tomorrow?The train had left by the time he got there.3“ 被〞This novel was written by Lu Xun.4“ 经过〞He passed by me without noticing me.5 在 ... 旁边“Sit by me. They are playing by the river.。
英语语法时态语态从句大全
英语语法：句型时态一、一般现在时：1.概念：经常、反复发生的动作或行为及现在的某种状况。
2.时间状语： always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays,3.基本结构：动词原形（如主语为第三人称单数，动词上要加（e）S）4.否定形式：am/is/are+not;此时态的谓语动词若为行为动词，则在其前加don't,如主语为第三人称单数，则用doesn't，同时还原行为动词。
5.一般疑问句：把be动词放于句首；用助动词do提问，如主语为第三人称单数，则用does，同时，还原行为动词。
6.例句：. It seldom snows here.He is always ready to help others.Action speaks louder than words.二、一般过去时：1.概念：过去某个时间里发生的动作或状态；过去习惯性、经常性的动作、行为。
2.时间状语：ago, yesterday, the day before yesterday, last week(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc.3.基本结构：be动词；行为动词4.否定形式：was/were+not;在行为动词前加didn't，同时还原行为动词。
5.一般疑问句：was或were放于句首；用助动词do的过去式did 提问，同时还原行为动词。
6.例句：She often came to help us in those days.三、现在进行时：1.概念：表示现阶段或说话时正在进行的动作及行为。
2.时间状语：now, at this time, these days, etc.3.基本结构：am/is/are+doing4.否定形式：am/is/are+not+doing.5.一般疑问句：把be动词放于句首。
初中语法 从句中的时态问题
初中语法从句中的时态问题从句中的时态问题从句作为一个句子的组成部分，承担着为主句提供更多信息的任务。
在从句中，时态的使用是十分重要的，正确的时态可以保证句子的准确表达，避免歧义。
在初中语法中，对从句中的时态问题的理解和运用是非常关键的。
本文将介绍从句中常见的时态问题，并提供相应的解决方法，帮助同学们更好地理解和掌握初中语法。
一、宾语从句中的时态问题宾语从句是指在一个句子中作为宾语的从句。
宾语从句一般由连接词that引导，也可以由疑问词（如what, where, when, how等）引导。
宾语从句中的时态与主句的时态有紧密的联系。
1. 当主句的谓语动词是一般现在时、一般将来时或一般过去时时，宾语从句的时态要根据实际情况来选择。
例如：He says (that) he is a student.（现在时态）She said (that) she would go shopping tomorrow.（将来时态）They knew (that) she had finished her homework.（过去时态）2. 当主句的谓语动词是一般过去时，表示客观的事实或真理时，宾语从句要使用一般现在时。
例如：He said (that) the earth revolves around the sun.（过去时态）3. 当主句的谓语动词是过去时的某种特殊形式（如过去进行时、过去完成时等）时，宾语从句的时态要根据实际情况选择。
例如：He said (that) he was watching TV when she arrived.（过去进行时态）二、条件从句中的时态问题条件从句表示条件和结果之间的关系，通常由if引导。
1. 当条件从句表示的是与现在或将来相反的情况时，谓语动词要使用虚拟语气，即过去时态。
例如：If I were you, I would study harder.（与现在相反的情况）2. 当条件从句表示的是与过去相反的情况时，谓语动词要使用过去完成时。
while的主句和从句的时态
while的主句和从句的时态
1、当while表示同时的时候，主句和从句的时态一致，既可以都用一般现在时，又可以都用一般过去时。
表示过去同时发生或现在正在同时发生的事。
比如：Father was cooking the meal while i was doing my homework。
2、在while所引导的状语从句中，如果从句的主语和主句的主语相同，且动词又是be动词时，从句的主语和be动词往往可以省略。
while的具体用法：
1、“当……时候”，引导时间状语从句，从句动作必须是延续性的。
Please don't talk so loud while others are working。
While I was cleaning the window，my finger was seriously cut。
2、“虽然，尽管”相当于although，引导让步状语从句，常把while放在句首。
While she is a top student，she has some shortcomings。
While the Internet is bridging the distance between people，it may also be breaking some home or will cause other family problems。
3、“只要，如果”等于as long as，引导条件状语从句。
There is hope while there is life。
主从句的时态问题
从句和主句中谓语动词的时态在复合句中，主句和从句的谓语动词时态一般遵循以下的规律：一① 在以下三种主语从句中，主语从句的谓语动词要用“should+动词原形”， should可省略。
(1)It is+形容词+that…句型。
常见的形容词有important, necessary, natural, funny, strange, surprising, astonishing(令人惊讶的)等。
(2) It is +名词+that…句型。
常见的名词有pity, shame, advice, suggestion, proposal(提议，建议)， requirement, request, desire, order 等。
(3) It is+动词的过去分词+ that…句型。
常见的动词有advise, order, propose, request, suggest, demand, require等。
②在insist(坚持)， urge (催促)， order(命令)， command(命令)，suggest(建议)，advise(建议)，recommend(建议，推荐)， request(请求，要求)， demand(要求)，require(要求，需要)等动词后的宾语从句中，谓语动词用“should+动词原形”， should可省略。
③ 在含有advice, order, demand, proposal(提议)， requirement, suggestion等名词的表语从句、同位语从句中，谓语动词用“should+动词原形”，should可省略。
④在一些表示惊讶、意志等感情色彩的名词性从句中，谓语动词用“shou ld+动词原形”或“should +have done”，译为“竟然，居然”。
例如：I am surprised /shocked that you should speak i n such a way。
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时间状语从句和条件状语从句中的主将从现：
一般说来, 若主句的谓语动词表示将来的动作或存在的状态时, 与其连用的时间或条件状语从句的谓语动词常用一般现在时表示将来时间. 这种用法常见于以下几种情况:
一. 当主句的谓语动词是一般将来时时, 由when, before, after, as soon as, until 等连词引导的时间状语从句和由if引导的条件状语从句用一般现在时.
例如: We’ll go to visit the Great Wall if it doesn’t rain tomorrow. 如果明天不下雨, 我们将去参观长城. I’ll tell him the good news as soon as I see him. 我一见到他, 就告诉他这个好消息.
二. 当主句的谓语含有may, can, must等情态动词时, 由when , before, after, until, as soon as等引导的时间状语从句和由if引导的条件状语从句用一般现在时. 例如: You may go fishing if you’re free. 如果你有空, 你可以去钓鱼. You can go home after you finish your homework. 你做完作业后就可以回家.
三. 当主句的谓语是want, hope, wish等动词的一般现在形式, 由when, before, after, until, as soon as引导的时间状语从句和if引导的条件状语从句用一般现在时. He wants to be a doctor when he grows up. 他长大后想当一名医生. 四. 当主句是祈使句时, 由when, before, after, until等引导的时间状语从句和由if引导的条件状语从句用一般现在时. 例如: Look before you leap. (谚语)三思而后行. Put up your hands if you have any questions to ask.如果有问题要问, 请举手.
宾语从句的时态问题
1）当主句的谓语动词是一般现在时时，其宾语从句的时态可以是任何适当的时态。
所以，宾语从句的时态应根据实际情况而定。
She says (that) she works from Monday to Friday. 她说她从周一至周五上班。
（从句是一般现在时）
She says (that) she will leave a message on his desk. 她说她要在他桌子上留个便条。
（从句是一般将来时）She says (that) she has never been to Mount Emei. 她说她从来没有去过峨嵋山。
（从句是现在完成时）
2）当主句的谓语动词的时态是一般过去时的时候，其宾语从句的时态一般要用任一适当的过去时态。
He said there were no classes yesterday afternoon. 他说昨天下午没有课。
（从句是一般过去时）
He said (that) he was going to take care of the baby. 他说他会去照看这个婴儿。
（从句是过去将来时）
He said (that) they were having a meeting at that time. 他说他们那时正在开会。
（从句是过去进行时）
但是当宾语从句是表达客观真理和规律的句子时，其时态仍旧用一般现在时。
The teacher told us(that) nothing is difficult if we put our hearts into it. 老师告诉我们世上无难事,只怕有心人。
She said(that) her father is twenty-eight years older than her. 她说她父亲比她大二十八岁。
He said that light travels much faster than sound. 他说光比声音传播得快。
He told me that I must go to school on time every day. 他告诉我我必须每天按时上学。