仁爱版8年级英语下册名师讲解：宾语从句的时态
仁爱八年级下册Unit-7-Topic-1宾语从句大揭秘课件
1. I knew that he was reading. 2. I knew that he would go to Beijing. 3. I knew that he was sick yesterday. 4. I knew that he had lived here for two years.
宾语从句大揭秘
Objective Clause
主要内容
• 1.宾语 & 宾语从句 • 2.宾语从句——引导词 • 3.宾语从句——语序 • 4.宾语从句——时态
Part 01
宾语 & 宾语从句
宾语 & 宾语从句
1. I know him . （简单句）
主语 谓语 宾语
宾语：动作承受者， 即动词后的人事物
2.She told me, “I miss my country.” She told me (that) she missed her country. 陈述句式作从句，that连接可省略
2.if / whether选择“是否”
1.Is he a teacher? I want to know. I want to know if/ whether he is a teacher. 2. Did he call me? I don't know. I don't know if/ whether he called me.
2. I know who he is . （复合句）
主语 谓语 引导词 从句主语 从句谓语
主句
宾语从句
宾语从句：句子充当宾 语，即引导词+主+谓+
其它
八年级英语下册《Unit 8 Our Clothes》宾语从句的用法知识精讲 (新版)仁爱版
宾语从句的用法【概念引入】1. 宾语从句名言：（1) that引导的宾语从句Sometimes we need to remind ourselves that thankfulness is indeed a virtue.有时我们需要提醒自己，感激是真正的美德。
Health is the thing that makes you feel that now is the best time of the year.健康使你感到现在是一年中最好的时光。
（2）what引导的宾语从句If you can’t have the best, make the best of what you have.没有最好的，就充分利用现有的。
If you don’t have what you like，you must like what you have.没有你喜欢的东西，就喜欢你现有的东西。
2. 宾语从句定义：在主从复合句子中，充当宾语，位于及物动词、介词或复合谓语之后的从句称为宾语从句。
宾语可分为三类：动词的宾语从句、介词的宾语从句、形容词的宾语从句。
【用法讲解】1. 宾语从句的引导词在复合句子中，作宾语的从句叫宾语从句。
例如：I want to know whose book this is.我想知道这是谁的书。
宾语从句的引导词有三种：1）that；2）whether/ if；3）特殊疑问词what/ when/ where/ who等。
例如：He said that he could help me. 他说他能够帮助我。
Your mother asked if you could finish your work this week.你妈妈问这个星期你能否完成工作。
Can you tell me when the sports meeting will begin？你能告诉我运动会将在什么时候开始吗？(1) 以that引导的宾语从句：that引导的宾语从句一般都是由陈述句充当，引导词that没有实际意义，不在从句中作任何成分，that可以省略，而且从句成分齐全，句意完整。
仁爱版英语八年级下册Unit7_Topic2_语法专项课件(宾语从句2)
【典例2】Translate 1. 我认为不会下雨．
I __d_o_n_’t_t_h_i_n_k__ that it ____w_i_l_l _ra_i_n__. 2. 我认为你的答案不对.
I __d_o_n_’_t _th_i_n_k___your answer ＿i＿s Nhomakorabearight.
考 查 宾 语 从 句 的 用 法 。 主 句 谓 语 是 think, believe, guess, suppose 等，而且主句的主语又是第一人称时， 它后面接的宾语从句的否定词通常要前移到主句中。
②在介词之后： It depends on whether it is going to rain.
③在不定式之前： We haven’t decided whether to go there.
宾语从句的特殊用法2
I don’t think he is right. 我认为他不对。 如 果 主 句 的 谓 语 动 词 是 think, believe, guess , suppose 等，而且主句的主语又是第一人称时，它 后面接的宾语从句的否定词通常要前移到主句中， 即否定主语中的动词．
【典例1】He asked his friend _______ to go there or not.
A. if
B whether C. what D. that
考查宾语从句连接词。句意：他问他的朋友要不要 去 那 儿 。 句 意 中 “ 是 否 ” 选 择 if/whether ， 而 只 有 whether能与or not连用，答案选B。
初中英语仁爱版八年级下册
Unit7 Topic2
语法专项课件 （宾语从句2）
宾语从句的特殊用法1
仁爱版八年级下册语法知识点总结讲解----宾语从句(PPT45张)
引导词 whether、if
whether\if 作引导词，它所引导的宾语从句是由一 般疑问句转换过来的，一般疑问句变成宾语从句之
后，语序由一般疑问句变成陈述句，句末标点
由主句决定。whether，if不能省略。
1.She as early? ”
什么 是宾语从句？
试比较
We know him． 简单句，宾语 主s 谓v 宾o
We know he likes English.复合句，宾语从句
主s 谓v 主s 谓v
宾o
宾o
当一个句子来充当宾语的时候，这个句子就叫宾语从句
宾语从句结构：主语 + 谓语+引导词（连词）+ 句子（陈述句）
宾语从句的位置
宾语从句
什么是宾语？
• 动作行为的对象，说明主语做什么。一般放在及__物___动__词__或__介__词___ 后面.
1.We study English. 2.Our teacher said that he would go there. 3.He is looking at the dog.
7) I ask Tom. Which Chinese dish is his favorite? (合并为一句话） I ask Tom which Chinese dish is his favorite （作从句的主语）
带how的词组也都可以引导宾语从句 ❖Could you tell us how much the coat is ?
（1）句中出现两个或两个以上的由that引导的宾语从句时。
由并列连词连接的两个或多个that引导的宾语从句，只有第一个从句中
的that可以省去，其余并列宾语从句中的that都要保留。
仁爱版英语八年级下册Unit7 Topic2 语法透视：whether 和if引导宾语从句
语法透视：whether 和if引导宾语从句一、if或whether引导宾语从句时，作“是否〞讲，常放在动词ask, see, say, know, find out等后面。
一般情况下，两者常可换用，在口语中多用if。
如：例1. Nobody knows whether (if) it will rain tomorrow. 没有人知道明天是否下雨。
例2 Lucy asked whether (if) they had a cotton sweater.露西问他们是否有棉制的羊毛衣。
二、if或whether引导宾语从句时，要注意三个方面，即连词、语序和时态。
1. if或whether不能和that或其它连词〔副词〕同时使用，也不能省去。
如：例3. 我不知道他今天是否会来。
[误] I don’t know that if (whether) he will come here today .[正] I don’t know if (whether) he will come here today .例4. 他走过来看看猫是否出了毛病。
[误] He came to see what if (whether) there was wrong with his cat .[正] He came to see if (whether) there was wrong with his cat .2 if或whether引导的宾语从句时，虽具有疑问意义，但从句语序应用陈述句语序。
如：例5. Did you know the way to the hospital? The old woman asked me.The old woman asked me if (whether) I knew the way to the hospital.老妇人问我是否知道去医院的路。
3. if或whether引导的宾语从句应和主句的时态保持一致。
仁爱版八年级下册 -- 宾语从句讲解和练习
初中宾语从句讲解及练习概念：在复合句中用作宾语的从句叫做宾语从句。
它在句中可以充当及物动词、介词或形容词的并与。
宾语从句的三大考点即：引导词、时态和语序。
一、宾语从句的引导词1.that引导的宾语从句当宾语从句是陈述句时，用连接词that引导，that在口语、非正式文体中常被省略。
He says(that) he has been to Shanghai twice. 他说他去过上海两次。
She said (that) she went to the park last week. 她说她上周去公园了。
2. 特殊疑问词引导的宾语从句当宾语从句是特殊疑问句时，特殊疑问词就是引导词。
特殊疑问词引导的宾语从句疑问词不可省略。
Could you please tell me where we will have a meeting?你能告诉我们将在哪儿开会吗？I wondered what I should do next. 我想知道下一步该做什么。
3. if或whether引导的宾语从句（1）当宾语从句由一般疑问句变来时，要用if或whether引导，意为“是否”。
If和whether只起到连接作用，不充当句子成分，一般情况下可互换，但if常用于口语中，whether常用于正式文体中。
I want to know if /whethe r he is waiting for me. 我想知道他是否在等我。
Could you tell me if /whether you have been to Australia?你能告诉我你是否去过澳大利亚吗？（2）下列情况下一般只能用whether：①与or not连用时I don’t know whether he likes the movie or not. 我不知道他喜不喜欢这部电影。
②作介词的宾语时Everything depends on whether we have enough time.一切取决于我们是否有足够的时间。
仁爱版英语八年级下册Unit7 Topic1 语法透视：宾语从句用法详解
语法透视：宾语从句用法详解在句子中起宾语作用的从句叫做宾语从句。
宾语从句分为三类：动词的宾语从句，介词的宾语从句和形容词的宾语从句。
一、宾语从句用法宾语从句的时态：1．主句用一般现在时，从句可用任意时态。
可归纳为“主现从不现”。
2．主句用过去时，从句用过去某个时态。
可归纳为“主过从句过”。
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。
宾语从句的连接词从属连词①连接宾语从句的从属连词主要有that, if, whether。
that引导表示陈述句的宾语从句，if和whether, whether...or not引导表示“是否”的一般疑问句的宾语从句。
如：He told me (that) he would go to college the next year他告诉我他明年上大学。
I don’t know if there will be a bus any more.我不知道是否还会有公交车。
Nobody knew whether he could pass the exam.没有人知道他是否会通过考试。
②连接代词who, whom, whose, what, whoever, whomever, whosever, whatever, whichever等。
连接代词一般指疑问，但what, whatever除了指疑问外，也可以指陈述。
如：Do you know who has won Red Alert game?你知道是谁赢得了红色警戒的游戏么？The book will show you what the best CEOs should know.这本书会告诉你最好的执行总裁该了解什么。
Have you determined whichever you should buy, a Motorola or Nokia cell phone?你决定好是买诺基亚还是摩托罗拉的电话了吗？③连接副词when, where, why, how, whenever, wherever, however等。
仁爱英语八年级Unit8 Topic 2宾语从句(PPT23张)
年级：八年级
主题：宾语从句 The Object Clause
宾语从句
概念：句子的宾语一般由名词、代词、动名词
或动词不定式充当，当一个句子充当宾语时, 我们把这个句子叫做宾语从句。
学习宾从三注意：连词、时态和语序。
1、引导词 2、从句的时态 3、从句语序
一、宾语从句的引导词
1. I'm afraid that we’ll be late for school. 2. I want to know if/whether it will rain tomorrow. 3. Could you tell me how I can get to the post office? 1.从句是陈述语气时，引导词用 that 。 2.从句是一般疑问语气时，引导词用 if/whether 。 3.从句是特殊疑问语气时，引导词用 how 。
又迟到了）
that连接陈述句，口语句中常省去， 从句若表“是否”时，if/whether要牢记，
特殊问句做宾语，疑问词引导就可以。
宾语从句
概念：句子的宾语一般由名词、代词、动名词
或动词不定式充当，当一个句子充当宾语时, 我们把这个句子叫做宾语从句。
学习宾从三注意：连词、时态和语序，
1、引导词 2、从句的时态 3、从句语序
注意要点
四、用whether不用if的几种情况 1)后接不定式时 eg. I can’t decide whether to go to Beijing. 2)与or not连用时 eg. I want to know whether you will go there or not . 3)在句首时 eg. Whether this is true or not, I can’t say.
仁爱英语八年级下册语法U7T2
1.宾语从句（二） 宾语从句（ 宾语从句 宾语从句的第二种类型由if或 连接词引导， 宾语从句的第二种类型由 或whether连接词引导，语序 连接词引导 要用陈述句语序， 要用陈述句语序，意思是 是否”“是不是” ”“是不是 “是否”“是不是”。如： I don’t know if/whether it is fine tomorrow.(语序必须 语序必须 是陈述句的) 是陈述句的 Do you know if/whether he’ll come? I don’t know if/whether he’ll come.（宾语从句用将来 （ 时态） 时态） ∆比较 he comes tomorrow, let me know.(条件状语 比较:If 比较 条件状语 从句用现在时态) 从句用现在时态 ∆注：if引导状语从句，译为“如果”；引导宾语从句， 引导状语从句， 注 引导状语从句 译为“如果” 引导宾语从句， 译为“是否” 等同于whether。当宾语从句后面有 译为“是否”，等同于 。当宾语从句后面有or not时，一般用 不用if。 时 一般用whether,不用 。 不用
仁爱版英语八下 unit7 Topic 1_语法专项(宾语从句1)课件
Can you tell me? What is she doing? Can you tell me what she is doing?
学习交流PPT
7
宾语从句连接词
疑问词
Do you know? Where does she live? Do you know where she lives?
学习交流PPT
10
宾语从句时态
1. 如果主句的时态是一般现在时，宾语从句的时态 根据具体情况来确定，可以是___任__何____时态。 I don’t think (that) you are right. Please tell us where we’ll go fishing tomorrow. Do you know when Mr. Smith moved here?
学习交流PPT
16
【典例2】Can you tell me ______ you were born, Betty? A. who B. what C. when D. that
考查宾语从句连接词。句意：贝蒂，你能告诉我你 什么时候出生的吗？从句you were born缺少时间或地 点，选择when作从句时间状语。
学习交流PPT
12
宾语从句三要素
3. 如果宾语从句所陈述的是客观真理，即使主句用
了过去时，从句仍用 _一__般___现__在__ 时态。例如：
The teacher said that the earth moves around the sun.
学习交流PPT
13
易错点1 有几种情况的语序不变
1. What’s the matter/trouble等 2. Which is the way to ……句式 3.Who 做主语的情况。
仁爱版8年级英语下册名师讲解：初中英语宾语从句
名师讲解：初中英语宾语从句请同学们来看下面这几个句子：I like swimming. 宾语He has a pen.宾语My sister wants to be a teacher.宾语I think he is right.宾语宾语从句是主从复合句的一种。
主从复合句是由一个主句和一个或一个以上的从句构成的。
主句是复合句的主体，从句仅仅是主句的一个成分，它从属于主句，不能独立。
从句在全句中充当什么成分，就叫什么从句。
宾语从句当中的从句在全句中作宾语。
一．宾语从句的连接词1. 由从属连词that引导的宾语从句：that 在句中无词汇意义，在从句中不能充当成分，在口语当中往往省略。
例如：He said (that) he wanted to stay at home.She doesn’t know (that) she is seriously ill.I am sure (that) he will succeed.2. 由连接代词Who, whom, whose, which，what 和连接副词where, how, why, when引导的宾语从句.这些连接代词和连接副词在宾语从句中充当某个成分。
例如：Do you know who (whom) they are waiting foe?He asked whose handwriting was the best.Can you tell me where the No.3 bus stop is?I don’t know why the train is late.考点归纳(1)——宾语从句的连接词•1、That 只起连接作用，在句子中不做句子成分，在口语中常被省略•2、If 和whether 起连接作用，不做句子成分。
•（注意：与不定式连用；做介词的宾语；与or not 连用-----用whether。
•3、疑问词who、what 、when、where 、whom 、whose 、why、how 、which 在句子中既起连接作用，又做句子成分。
(完整版)宾语从句的时态和语序要点
(完整版)宾语从句的时态和语序要点在英语语法中，宾语从句是一种句子结构，用作及物动词的宾语。
了解宾语从句的时态和语序要点是非常重要的，下面是一些关键要点：1. 宾语从句的时态：宾语从句的时态：- 若主句的谓语动词是一般现在时、一般将来时、或者含有客观真理的情况下，宾语从句一般保持不变。
- 若主句的谓语动词是过去时，宾语从句中的时态通常需要根据实际情况进行相应的变化。
- 如果主句谓语动词是过去时的虚拟语气，宾语从句中的谓语动词也需要使用相应的虚拟语气形式。
2. 宾语从句的语序：宾语从句的语序：- 宾语从句的语序通常保持与陈述句的语序相同，即主语 + 谓语 + 其他成分。
- 在间接引语中，时态、人称、指示词等可能发生变化，但总体保持陈述句的语序。
3. 连接词的使用：连接词的使用：- 为引导宾语从句，常用的连接词有：that, whether, if, when, where, what, who, whom, whose, why, how等。
具体使用哪个连接词取决于宾语从句的内容。
- 当主句谓语动词为瞬间动词（如：think, believe, consider）时，that可以省略，而其他连接词不可省略。
例如：I believe (that) he isa good person.4. 宾语从句时态和语序的例子：宾语从句时态和语序的例子：- 我不知道他在哪里。
I don't know where he is.（主句为一般现在时，宾语从句保持不变）- 他告诉我他正在读一本好书。
He told me that he is reading a good book.（主句为过去时，宾语从句谓语动词保持一般现在时）请注意以上是宾语从句时态和语序的一些要点和例子，根据实际情况和具体语境，宾语从句的使用可能会有一些细微的差异。
希望这份文档对您有所帮助！。
仁爱版8年级英语下册语法巧记口诀：宾语从句
语法巧记口诀：宾语从句
【速记口诀】
宾语从句须注意，几点事项应牢记。
一是关键引导词，不同句子词相异。
陈述句子用that；一般疑问是否(if，whether)替；特殊问句更好办，引导还用疑问词。
二是时态常变化，主句不同从句异。
主句若为现在时，从句时态应看意；主句若为过去时，从句时态向前移。
三是语序要记清，从句永保陈述序。
【妙语诠释】
宾语从句应注意三点：
①引导词，陈述句一般由that引导，这时的that可以省略；一般疑问句则由if
或whether引导；而特殊疑问句则由特殊疑问词引导。
②时态，主句是现在时态，从句可用所需要的任何时态；但如果主句是过去时
态，从句时态所表示时间一般往前移一个时间段。
③语序，宾语从句永远要用陈述句顺序。
仁爱英语八年级下宾语从句
1. Do you know what____this time yesterday. A. they are doing B. were they doing C. they were doing D. are they doing
2．-Could you tell me __？I'm going to see him．
1)连词that(主句对从句没疑问) 无 词汇意义
He knew\told me（that）he should work hard．
2）连词whether或if：（主句对从 句有疑问）作“是否”
Tom didn't know\ can you tell me if／whether his grandpa liked the present．
2. Can you tell me Why was the train late yesterday? Can you tell me why the train was late yesterday?
3. I want to know Are there good museums ?
I want to know If there are good museums.
—Dad，do you know_w_h_e_n_ the football game
will start？ —In half an hour.
1. He said ____ he liked the bag. A.if B. that C. what
2. He asked me____ you lived
He asked me whether it is
going to rain or not. （该句中的whether不能换成if， if不能与or连用。）
仁爱英语新版八下unit8topic3知识点梳理.doc
Unit8topic3宾语从句一．引导词（连接词）：1.that (that 常可省略),2.whether, if （whether or not）3.疑问词/词组：who, whose, what ,whichwhen ,where, how, why 等二．语序: 陈述句语序即：连接词+主语+谓语+其他成分。
三．时态：1.主句是一般现在时，从句根据实际情况使用任何时态。
The headmaster hopes everything goes well.2.主句是过去时态，从句须用过去时态的某种形式。
She was sorry that she hadn’t finished her work on time.3.当宾语从句表示的是一个客观真理或者事实时，即使主句是过去时，从句也用一般现在时态。
例句：The teacher told his class that light travels faster than sound. 四．If 假如，如果，引导条件状语从句，用一般现在时代替一般将来时。
是否，引导宾语从句When当…时候，引导条件状语从句，用一般现在时代替一般将来时。
在…时候，引导宾语从句I do not know if it_______(rain) tomorrow. If it _______(rain) tomorrow,I will stay at home.I do not know when he _______(come) tomorrow. When he_______ (come) tomorrow,I will call you.练习( )1.The teacher says_______she will leave a message on the desk. A．if B．who C．that D．what ( )2 The teacher asked the new student ________ class he was in. A. which B. where C. if D. that ( )3. I don’t know ________ Mr. Green will come to see us. He’ll help us with our English.A. whyB. whenC. howD. where( )4. --- Be careful! Don’t break the bottles. Do you hear ______ I said? David?--- Yes, MumA. whatB. thatC. whyD. if( )5.Do you know _____ they listened to yesterday evening?A. what B when C why D how( )6 He asked me _____told me the accident. A whom B which C who D whose( )7.They don't know ______their parents are. A that B what C why D which( )8.I don't know _________ he will come tomorrow. _________ he comes, I'll tell you．A. if; WhetherB. whether; WhetherC. if; ThatD. if; If( )1. Are you interested in _____?A. how did he do itB. he did it howC. how he did itD. he how did it( ) 2.I don’t know _____. Can you tell me?A. how the two players are oldB. how old are the two playersC. the two players are how oldD. how old the two players are( )3,Excuse me, sir. Could you tell me ____?A. Where the bank nearestB. where is the nearest bankC. where the nearest bank isD. the nearest bank is where( )4.She asked Tom ________ with his car?A. what the matter wasB. what the matter isC. what was the matterD. what is the matter( )5.Did you find out ______?A. she was looking for whose childB. whose child was she looking forC. whose child she is looking forD. whose child she was looking for( )6.Our father said that he ______ a new computer next week.A. will buyB. have boughtC. would buyD. buys( )7.I hear that he ______ to Beijing yesterday.A. goes B. will go C. went D. have gone( )8.The teacher told us yesterday that December 25 ____Christmas Day. A. is B. was C. . will be( )9.The teacher said that the earth _______round the sun. A. goes B. go C. went D. will go ( ) 10. Linda said the moon___ round the earth. A. travelled B.. travells1.Please tell me if she _______(come) again next time.2.We are sure that he ________ (go) to school tomorrow.3.. Do you know who ______ (be) the first man to walk on the moon?4.. Could you tell me where the post office ______ (is)?5. I hear that he _______ (swim) in the sea yesterday.6. The little boy tells us where his father _______ (work).7.Our father said that he _______ (will) buy a new computer.8.He told me he _______(help) her with her maths the next evening.9.She said they_______(know) each other for quite some time.rade Wang didn't know if there _______(be) on English evening that day.11.If it_______(not rain) tomorrow, we _______(visit) the Pople's Museum.12.Will you come and stay with us for a while when you _______(finish) doing your homework?一、将下面的句子连接成为含有宾语从句的复合句。
宾语从句的时态(仁爱八下)
UNIT8 TOPIC3宾语从句（四）：宾语从句的时态宾语从句的时态有以下几种规则：1．主句是一般过去时，从句也必须用过去时，但可以是过去时态的某一种。
I knew where she was from .（从句用一般过去时）我知道她来自哪里。
He asked me if I was listening to music at this time yesterday.（从句用过去进行时）他问我昨天这个时候我是否在听音乐。
She said that she would fly to Japan next week.（从句用过去将来时）她说她下周将要飞到日本去。
Jane said she had visited the summer palace.（从句用过去完成时）简说她参观过颐和园。
2．主句是一般现在时，从句时态不受主句时态限制，可根据实际情况使用任何时态。
He hopes everything goes well. （从句用一般现在时）他希望一切顺利。
Don't you think Jim is speaking too slowly？（从句用现在进行难道你不认为吉姆讲的太慢了吗？The radio says it will rain tomorrow.（从句一般将来时）收音机说明天会下雨。
She tells me she was a nurse 3 years ago.（从句用一般过去时）她告诉我三年前她是一个护士。
I want to know whether she was cleaning the room at this time yesterday.（从句用过去进行时）我想知道昨天的这个时候她是否正在打扫房间。
3．主句是祈使句，从句时态也不受主句限制，可用所需要的任何时态。
Show me which photo is yours.（从句用一般现在时）让我看看哪张照片是你的。
Please tell us where you bought this book last night.（从句用一般过去时）请告诉我你昨晚在哪里买的这本书。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
名师讲解：宾语从句的时态
宾语从句的时态
1. 如果主句的时态是一般现在时，宾语从句该用什么时态就用什么时态。
即，从句可用所需的任何时态
如：
I don’t think (that) you are right.
Please tell us where he is.
Can you tell me how I can get to the railway station?
He says Mary is playing with the cat .
He says Mary often plays with the cat.
He says Mary will play with the cat.
I think he left yesterday morning.
2. 如果主句的时态是一般过去时，宾语从句只能用相应的过去时态（一般过去时，过去进行时，过去将来时，过去完成时）。
例如：
He asked what time it was.
He told me that he was preparing for the sports meet.
He asked if you had written to Peter.
He said that he would go back to the U.S. soon.
He said, “Mary is playing with the cat.” →
He said Mary was playing with the cat.
He said, “he will go back to China soon.” →
He said he would go back to China soon
3. 如果宾语从句所陈述的是客观真理，其时态常用一般现在时，不受主句时态的限制。
例如：
Our teacher said that January is the first month of the year.
Scientists have proved that the earth turns around the sun.
The teacher said, “the moon moves around the sun.”
→ The teacher said that the moon moves around the sun.
He said, “light travels much faster than sound.”
→ He said light travels much faster than sound.
4、当主句为Could you (please) tell us-----?时，只表示语气，而不表示过去时态。
•考点归纳——宾语从句的时态
•1、当主句动词为一般现在时，从句可用所需的任何时态。
•2、当主句动词为一般过去时，宾语从句只能用相应的过去时态（一般过去时、过去进行时、过去将来时、过去完成时）。
•3、当宾语从句为客观真理时，用一般现在时态，不受主句时态的限制。
•4、当主句为Could you (please) tell us-----?时，只表示语气，而不表示过去时态。