一般现在时,一般将来时 主将从现
时间状语从句时态原则
时间状语从句时态原则
时间状语从句时态:主将从现。
主将从现是指在时间状语从句、条件状语从句和让步状语从句中，如果主句是一般将来时，从句用一般现在时替代-般将来时。
时态的呼应时态呼应一般来讲，复合句都要遵循主、从句时态呼应规律，状语从句也不例外。
即主句用现在时，从句也用现在时;主句用过去时，从句也用过去的某种时态。
如: Be careful when you cross the road.
过马路时要小心。
You must see the doctor if you are ill.
如果你生病了，你必须去看医生。
主句是一般过去时，从句也要用一般过去时。
如:
When he was seven years old, he could swim.
当他七岁时就会游泳。
She turned off the light before she left the office.
她离开办公室前就关了灯。
主将从现六种情况
1.如果主句是将来时或表示将来含义时，那么条件和时间状语从句多用一般现在时。
2.如果主句是折使句，那么从句通常要用一般现在时。
3.如果主句是含有情志动调的一般现在时，根据需要从句多用一最现在时。
4.如果的条件状语从句遇到变换间接和直接时，折使句应用“to”
5.主将从现说的是在合有时间状语从句和条件状语从向的主从
复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。
6、如果主句的时态是过去将来时，那么从向要用一般过去时。
2019年中考英语时态知识点：常见的主将从现的四种情况
2019年中考英语时态知识点：常见的主将从现的四种情况主将从现主将从现是指在时间状语从句和条件状语从句和让步状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。
主将从现常见的有以下四种情况：一、时间状语从句的主句是一般将来时，那么从句常常用一般现在时。
如：When I grow up, I’ll be a nurse and look after patients.我长大后要当一名护士，照顾病人。
二、如果主句是祈使句，那么从句通常要用一般现在时如：Don’t laugh at me when I make a mistake.我犯错误的时候不要笑话我。
三、如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时如：You should be quiet when you are in the reading room在阅览室时应保持安静。
四、如果if的条件状语从句遇到变换间接和直接时 , 祈使句应用not to....如; She said not to close the window常见的时间状语从句的连词有：as soonas,when,while ,as,until等主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。
例如：I will tell him about it when he comes.If it is fine tomorrow, we will go outing.如果主句的时态是过去将来时，那么从句要用一般过去时。
例如：He said that he would have another try if he had the chance.I knew he could help me if he was free the next day.主要标志有：if 、unless 、until、 when 、as soon as。
主句将来时从句用什么时态
如果时间、条件、原因状语从句中主从句的动作发生在将来，则主句用将来时，从句用一般现在时，也就是人们说的主将从现的概念。
in case 和no matter what 引导的状语从句都是按照这个理论。
知识拓展连词when,before,after,if引导的状语从句要特别注意其时态。
1．当主句的谓语动词是一般将来时时，从句要用一般现在时。
如：The boy will be a writer when he grows up.这个男孩长大后将成为一名作家。
I won’t go to school if it rains tomorrow.如果明天下雨我就不去学校。
2．主句的谓语动词是情态动词+动词原形时，从句的谓语动词也用一般现在时。
如：When the lights are red,the traffic must stop.红灯亮时，车辆必须停下。
3．主句是祈使句时，从句也要用一般现在时。
如：Please don’t go to bed before you finish your homework.在完成作业之前，请不要休息。
4．主句谓语用一般过去时时，从句也要用一般过去时。
如：They talked about the party after people left.人们离开后，他们谈论这次晚会情况。
在if、unless等词引导的条件状语从句，when、till/until、as soon as、the time等词引导的时间状语从句，以及the more...the more结构引导的程度状语从句中，当主句中的动词用一般将来时，从句中的动词通常用一般现在时表示将来时间。
有时，也可以在从句中用现在完成时表示将来某一时刻前已完成的动作。
when主将从现的用法
when主将从现的用法When主将从现的用法是指在主句使用一般时态（一般现在时、一般过去时、一般将来时），而在从句使用将来时态（一般将来时、进行时、完成时）的一种语法结构。
这种结构通常用来表示时间上紧接着主句发生的将来的情况或者计划。
以下是一些相关的参考内容来详细说明这种用法。
一、表示定期或安排好的未来事件1. The conference will start when all the participants arrive.（当所有参与者到达时，会议将开始。
）2. I will go to the gym when I finish work.（我下班后会去健身房。
）3. She will call her parents when she arrives at home.（她到家时会给父母打电话。
）二、表示时间条件1. We will visit the museum when it opens next week.（下周博物馆开放时我们会去参观。
）2. When he gets the results, he will decide whether to apply for the job or not.（当他收到结果时，他会决定是否申请这个工作。
）3. I will buy a new car when I have enough money.（当我有足够的钱时，我会买一辆新车。
）三、表示有条件的结果1. When you study hard, you will pass the exam.（当你努力学习时，你会通过考试。
）2. If you water the plants regularly, they will grow well.（如果你定期浇水，植物会生长得很好。
）3. When we eat healthy food, we will improve our health.（当我们吃健康的食物时，我们的健康状况会改善。
主将从现 知识讲解 “主将从现”适用于什么样的从句中
主将从现知识讲解“主将从现”适用于什么样的从句中所谓的“主将从现”第一层次，即“主句用将来时（现在将来时和过去将来时），从句用一般时（一般现在时和一般过去时）”,这一层次也可以称作“初中层次”。
第二层次：“主将”中将来时有将来进行时，将来完成时，将来完成进行时，而“从现”中相应的时态也可能是现在进行时，现在完成时，现在完成进行时。
例如：If the snow has completely stopped, we will be playing with snow on the playground.如果雪能够完全停下来，我们将正在操场上玩雪呢！If it is snowing, we will have been walking in the snow for more than two hours.如果天一直在下雪，我们将在雪地里走了两个多小时了。
另外，引导条件状语从句的连接词（connector）还可以是unless, so long as, in case, on condition that, supposing that, provided that 等。
if引导条件状语从句的两种用法：第一种用法：当某事发生的可能性较大时，这种情况，有个十三字口诀：“主将从现，主过将从过，主现从现”。
即主句是一般将来时，从句用一般现在时；主句用过去将来时，从句用一般过去时；当主句中有can/can’t的话，则从句用一般现在时。
例如：If he has time, he will come tomorrow.If she finishes early, she can come back early.If you don’t do homework, the teacher will scold you.第二种用法：1.if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。
主将从现
主将从现是指在时间状语从句和条件状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。
常见的有以下四种情况：一、条件状语从句的主句是一般将来时，那么从句常常用一般现在时如：When I grow up, I’ll be a nurse a nd look after patients我长大后要当一名护士，照顾病人二、如果主句是祈使句，那么从句通常要用一般现在时如：Don’t laugh at me when I make a mistake.我犯错误的时候不要笑话我。
三、如果主句是含有情态动词的一般现在时，根据需要从句多用现在进行时如：You should be quiet when you are in the reading room在阅览室时应保持安静四. 如果if的条件状语从句遇到变换间接和直接时, 祈使句应用not to....如; She said not to close the window别主句与从句：简单而言主句就是问题的中心所在。
一个句子的中心意思体现在主句中。
所以判断主从关系要从意思入手。
或者根据引导词来看，引导词的后面是从句。
定语从句主要修饰名次与代词.主要关系词有;who whom whose which that when where why表语从句置于连系动词后面做表语。
时间状语从句when, whenever, while, as, before, after, since, till, once, as soon as,etc. 地点状语从句where,wherever原因状语从句because, since, as, for, now that, etc.目的状语从句in order that, so that, that, etc.结果状语从句so…that, so that, such…that, that, etc.条件状语从句if, unless, as(so)long as, etc.让步状语从句though, although, even if, even though, however, whatever, as,etc.比较状语从句as…as, so…as, than, e tc.方式状语从句as, as if, as though, etc.。
主将从现——精选推荐
主将从现主将从现主将从现是指在时间状语从句和条件状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。
现在时替代一般将来时。
常见的有以下四种情况：常见的有以下四种情况：一、一、 条件状语从句的主句是一般将来时，那么从句常常用一般现在时条件状语从句的主句是一般将来时，那么从句常常用一般现在时如When I grow up, I ’ll be a nurse and look a er pa ents 我长大后要当一名护士，照顾病人我长大后要当一名护士，照顾病人 二、二、 如果主句是祈使句，那么从句通常要用一般现在时如果主句是祈使句，那么从句通常要用一般现在时如：Don ’t laugh at me when I make a mistake. 我犯错误的时候不要笑话我。
我犯错误的时候不要笑话我。
三、三、 如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时如：You should be quiet when you are in the reading room 在阅览室时应保持安静在阅览室时应保持安静 四. 如果if 的条件状语从句遇到变换间接和直接时的条件状语从句遇到变换间接和直接时 , 祈使句应用not to.... 如; She said not to close the window 常见的时间状语从句的连词有：as soon as, when, while ,as ,un l 等主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。
一般将来时，那么从句要用一般现在时。
例如：例如： I will tell him about it when he comes. If it is fine tomorrow, we will go ou ng. 任务I. 请用正确的形式填空。
主将从现 指的是 一些从句里的时态呼应
主将从现指的是一些从句里的时态呼应..在由if，unless ，when，as soon as ,not... until 引导的从句中当主句是一般将来时，祈使句，或者含有情态动词的时候从句用一般现在时初中阶段主将从现的句型就这五个主句三种情况一般将来时祈使句或者含有情态动词的时候从句是一般现在时比如I will go to the park if it ____(not rain) tomorrow.Please tell him the news as soon as he ___(arrive )in Beijing.He should finish the work unless he ____(go) on a trip.在这里主句是祈使句please...所以从句必须是一般现在时arrives因为主句中含有should 情态动词所以从句用一般现在时goes（）2. ---What will Bill do if he __in the test?---He will try again.A. failB. failsC. will failD. is failing() 3. Please tell her the news when she___.OK, I will.() 4. The students will plant trees if it ___ tomorrow.A. didn’trainB. hasn’t rainedC. won’t rainD. doesn’t rain() 5. We__ home if there is no bus.---Oh, what a pity!A. will walkB. have walkedC. walkedD. walk() 6 . If it ___ tomorrow, I’ll go by car.A. rainB. will rainC. rainsD. would rain() 7. If Mary ____ next Sunday, we will go boating together.()8. ---Don’t forget to ask him to write to me.---I won’t. As soon as he____, I’ll ask him to write to you.You can have two days off if your work____(finish) next.首先这句话的关键词是if 而且主句中包含情态动词can 所以从句用一般现在时然后看从句的主语和谓语动词finish的关系是被动关系所以从句用一般现在时的被动语态结构主语+ am/is/ are +过去分词所以答案是is finished( )13. --- Can I go to Beijing for my holiday, Dad?--- You can when you ____ a bit older.A. will getB. getC. are gettingD. got ( )14. If he ____harder, he will catch up with us soon.A. study B. studies C. will study D. studied ( )15. Frank ____ to see his grandma if he ____ free tomorrow.( ) 16.–When will you tell him the good news?--I will tell him about it as soon as he ____ back.A. will getB. getC. are gettingD. got 答语中关键词是when 看主句中有情态动词can 所以从句的时态用一般现在时从句的主语是you 所以动词用原形我先说一下动词时态的题的做题步骤或者做题思路动词时态题首先找句中的时间根据时间确定时态然后再看主语和动词的关系主动关系的话用主动语态被动关系的话用被动语态然后分别按照主动语态和被动语态的结构去寻找答案一般现在时表示一般性习惯性经常性的动作或状态结构主动语态肯定句主语+动词+其他。
主将从现
在复合句中，由when ,as soonas ,after ,before ,until , unless等引导的时间状语从句和由if 引导的条件状语从句，都符合“主将从现”的原则，即主句是一般将来时（或用一般现在时表示一般将来时的意义），从句要用一般现在时。
这是历年中考的考查热点。
①一般将来时②一般现在时will doam/is/aream /is/are going to dodo/does例：I’ll go to the zoo if it ________ tomorrow.A. doesn’t rainB. will rainC. rainsD. won’t rain (2005年甘肃省)I’ll give the note to her as soon as she_______ back.(come)中考链接：（下面这些题都是2004和2005年各省市的中考题）1. If he _______ harder, he will catch up with us soon.A. studyB. studiesC. will studyD. studied (2004年北京市)2. We’ll go to visit Tian’anmen Square________ it doesn’t rain tomorrow.A. ifB. as soon asC. whenD. since (2004年河北省)3. – Do you know if we will go to the cinema tomorrow?-- I think we’ll go if we _______ too much homework.A. will haveB. hadC. won’tD. don’t have (2004 年长沙市)4. Frank ______ to see his grandma if he ______ free tomorrow.A. will come, will beB. comes, isC. will come, isD. comes, will be (2004年吉林省)5. I am waiting for my friend. ________ , I will go swimming alone.A. If he doesn’t comeB. If he won’t comeC. If he will comeD. If he is coming (2004年陕西省)6. – Will you come to the dinner party?-- I won’t come unless Jenny__________ .A. will be invitedB. can be invitedC. invitedD. is invited (2004年安徽省)7. Tomorrow is Sunday, Jim will go hiking with his friends if it __________ .A. isn’t rainB. doesn’t rainC. won’t rainD. don’t rain (2004年哈尔滨市) 8. – How do you go to the zoo tomorrow? -- If it _________ tomorrow, I’ll go there by car.A. rainsB. rainC. rainingD. will rain (2004年甘肃省)9. Young man! If you _________ again, you’ll lose your job.A. will beB. wereC. areD. have been (2004年南宁市)10. Can you play games with us when your homework _________ ?A. is finishedB. will finishC. finishD. will be finished (2004年四川省资阳市)11. You will stay healthy ________ you do more exercises, such as running and walking.A. ifB. howC. beforeD. where (2004年北京市海淀卷)12. I won’t believe that little Bob can run 100 metres in 15 seconds ______ I see it with my own eyes.A. untilB. afterC. whenD. if (2004年黑龙江省)13. –I don’t know _______ he will come tomorrow.-- Don’t worry. _______ he comes, I’ll let you know.A. whether…IfB. if …WhetherC. when …WhetherD. that… If (2004年安徽省芜湖市)14. –It’s 9 o’clock now. I must go.-- It’s raining outside. Don’t leave______ it stops.A. whenB. sinceC. whileD. until (2005年北京市)15. Frank _______ a film if he’s free next Saturday.A. seeB. sawC. has seenD. will see (2005年北京市)16. If Mr Smith ________ back, please let me know.A. will comeB. comesC. cameD. had come (2005年宁波市)17. I don’t know if it ______ tomorrow. If it _________ , I will stay at home.A. will rain, rainsB. rains, will rainC. will rain, will rain (2005年哈尔滨市)18. The sports meet will continue________ it rains this afternoon.A. ifB. sinceC. as soon asD. unless (2005年天津市)19. – I want to know when ______ have a field trip.-- We’ll have it when all the work________.A. you are, will finishB. you will, finishesC. you will, is finishedD. you will, is finish (2005年辽宁省)20. We won’t go to the park if it ________ tomorrow.A. rainsB. will rainC. is raining (2005年青海省)答案：1.B 2.A 3.D 4.C 5.A 6.D 7.B 8.A 9.C 10.A 11.A 12.A 13.A 14.D 15.D 16.B 17.A 18.D 19.C 20.A。
主将从现知识讲解
主将从现知识讲解“主将从现”适用于什么样的从句中学员：王韧聪教师：李军力if引导条件状语从句的两种用法：“主将从现”和表事实时用现在时零碎用法" if " 引导的条件状语从句的用法,现在总结一下:if 条件句不一般,几个要点记心间;条件句,放在前,逗号要放句中间。
条件句表可能，主句多用将来时；条件句表事实，主句常用现在时。
在 if 引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。
如：We can walk there if we can't find a bus .If it rains tomorrow , we will not go to the zoo.What will you do if you find a panda in danger.如果 if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。
如：If bears are in danger ,they attack people.注意：在 if 引导的条件状语从句中，if 条件句位置灵活，可直接放在主句后面，若 if 条件句放句首，从句后面要加逗号，和主句隔开。
还要注意前后时态一致原则我们知道,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:If you ask him, he will help you.如果你请他帮忙,他会帮你的。
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。
另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设,从句多用一般过去时或过去完成时。
如:If I were you, I would invite him to the party.如果我是你,我会邀请他参加聚会。
如何理解时态呼应中的“主将从现”
如何理解时态呼应中的“主将从现”有朋友在本站“答疑中心”询问：如何理解时态呼应中的“主将从现”。
其实，英语语法书上没有“主将从现”这一语法术语，只是我们的英语教师在教学上为方便学生（主要是初学者）的理解和记忆，特地创造了这个术语。
它的意思是：当主句是一般将来时时，其相应的时间状语从句、条件状语从句、让步状语从句等习惯上要用一般现在时替代将来意义，而不能直接使用一般将来时。
一、通常情况1. “主将从现”见于时间状语从句As soon as I get through with my work I’ll join you. 我工作一做完就来找你们。
As soon as my divorce goes through, we’ll get married. 一俟我的离婚申请获准，我们就结婚。
Before they drive any of the buses, they will have to pass a special test. 然而在驾驶公共汽车前,他们必须通过专门测验。
My mother will be very angry with me when she finds out where I’ve been. 我母亲要是知道我到过那地方一定会大怒。
We’ll pay you half up front and the other half when you’ve finished the job. 我们先付给你一半钱，剩下的一半等你干完了再付。
2. “主将从现”见于条件状语从句If (it is) necessary I will come at 6. 如有必要，我6点钟来。
If today is Wednesday, the day after tomorrow will be Friday. 今天要是星期三，后天就是星期五。
If you train hard, you’ll make a good footballer. 你要刻苦训练就能成为优秀的足球运动员。
主将从现常见的有以下六种情况
常见的有以下六种情况：一、如果主句是将来时或表示将来含义时，那么条件和时间状语从句多用一般现在时如：When I grow up, I will be a nurse and look after patients/ I want to be a nurse and look after patients.我长大后要当一名护士，照顾病人。
二、如果主句是祈使句，那么从句通常要用一般现在时如：Don’t laugh at me when I make a mistake.我犯错误的时候不要笑话我。
三、如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时如：You should be quiet when you are in the reading room在阅览室时应保持安静。
四、如果if的条件状语从句遇到变换间接和直接时, 祈使句应用not to....如; She said not to close the window常见的时间状语从句的连词有：as soon as,when,while ,as,until等五、主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。
例如：I will tell him about it when he comes.If it is fine tomorrow, we will go outing.六、如果主句的时态是过去将来时，那么从句要用一般过去时。
例如：He said that he would have another try if he had the chance.I knew he could help me if he was free the next day.主要标志有：if 、unless 、until、when 、as soon as等If引导的条件句（if翻译成"如果"的时候）Ⅰ.(if 从句) 主句v./ v.三单will+v.Ⅱ. if+sb+v./ v.三单can+v.某事很可能发生，条件是可能存在的，主句中某种情况发生的概率也是很高的。
八年级英语语法主将从现知识点精讲及专项练习
八年级英语语法主将从现知识点精讲及专项练习主将从现定义：主将从现是指在时间状语从句和条件状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。
引导时间状语的引导词when , while , before , after , untill , till , since , as soon as主将从现一般出现的四种情况：一、如果主句是将来时或表示将来含义时，那么条件和时间状语从句多用一般现在时如：When I grow up, I will be a nurse and look after patients/ I want to be a nurse and look after patients.我长大后要当一名护士，照顾病人。
二、如果主句是祈使句，那么从句通常要用一般现在时如：Don’t laugh at me when I make a mistake.我犯错误的时候不要笑话我。
三、如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时如：You should be quiet when you are in the reading room在阅览室时应保持安静。
when引导的时间状语从句例句展示：As soon as I reach Canada, I will ring you up. 我一到加拿大，就给你来电话。
I’ll call you as soon as I get home.我一到家就给你打电话。
I’ll wait here until/till the rain stops.我将在这里等着，直到雨停。
You can’t go home until/till you finish your work.直到你完成你的工作，你才能回家。
I will tell you after they leave. 等他们走后我再告诉你。
We must strike while the iron is hot. 我们必须趁热打铁。
初中英语时态知识点：常见的主将从现的四种情况
Ifitisfinetomorrow,wewillgoouting.
如果主句的时态是过去将来时，那幺从句要用一般过去时。例如：
Hesaidthathewouldhaveanothertryifhehadthechance.
Iknewhecouldhelpmeifhewasfreethenextday.
在阅览室时应保持安静。
四、如果if的条件状语从句遇到变换间接和直接时,祈使句应用
notto....
如;Shesaidnottoclosethewindow
常见的时间状语从句的连词有：assoonas,when,while,as,until等
主将从现说的是在含有时间状语从句和条件状语从句的主从复合句
中，如果主句的时态是一般将来时，那幺从句要用一般现在时。例如：
主要标志有：if、unless、until、when、assoonas
我长大后要当一名护士，照顾病人。
二、如果主句是祈使句，那幺从句通常要用一般现在时
如：DontlaughatmewhenImakeamistake.
我犯错误的时候不要笑话我。
三、如果主句是含有情态动词的一般现在时，根据需要从句多用一般
现在时
如：Youshouldbequietwhenyouareinthereadingroom
初中英语时态知识点：常见的主将从现的四种情况
主将从现
主将从现是指在时间状语从句和条件状语从句和让步状语从句中，如
果主句是一般将来时，从句用一般现在时替代一般将来时。主将从现
常见的有以下四种情况：
一、时间状语从句的主句是一般将来时，那幺从句常常用一般现在
宾从,现完,主将从现
上课时间：学生姓名：——————————————————————————————————————————————八年级重点语法汇总（一）一、主将从现主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。
常见的有以下四种情况：（一）时间状语从句when：如果主句是一般将来时，那么从句常常用一般现在时如：When I grow up, I’ll be a nurse and look after patients（二）如果句中if表“如果”，主句用一般将来时，从句用一般现在时If it is fine tomorrow, we will go outing.（三）常见的主将从现的连词还有：as soon as, when ，until, unless等1. He didn’t get home until 9pm.2. He won’t leave until the teacher comes back.注意：主要标志有：if unless until when as soon as（一）如果主句的时态是过去将来时，那么从句要用一般过去时。
例如：He said that he would have another try if he had the chance.I knew he could help me if he was free the next day.（二）如果主句是祈使句，那么从句通常要用一般现在时二、宾语从句专项训练1. 宾语从句的语序2. 宾语从句的时态3. 宾语从句的引导词一、单项选择1. Will you please tell me ?A. where Pudong Airport isB. how far Pudong Airport wasC. how can we get to Pudong AirportD. when was Pudong Airport built2. It’s not polite to ask people in England.A. how much money you have gotB. what the weather is likeC. what your city looks likeD. how old are you3. I wonder if he tonight. If he , I’ll let you know.A. will come; will comeB. comes; comesC. will come; comesD. comes; will come4. I can’t say I want to see him again. We haven’t seen each other for nearly three years.A. how longB. how soonC. how oftenD. how much5. Our geography teacher told us that Japan the east of China.A. is inB. was inC. is toD. was to6. Nobody knows he’ll come or not.A. thatB. ifC. /D. whether7. I want to know _________.A. who is she looking afterB. that she is lookingC. whom is she lookingD. whom she is looking after8. Catherine said that she ___ to Guangzhou.A. has never goneB. had never goneC. has never beenD. had never been9. Linda said the moon___ round the earth.A. travelledB. has travelledC. travelsD. had travelled10. He is not sure _______ to watch TV.A. ifB. whetherC. thatD. /11. Mike is thinking about _______ his parents will see him today.A. ifB. whetherC. thatD. /12. --Do you know ______ the teacher will come back tomorrow or not?-- Sorry, I don’t know. _______ he comes back, I will tell you at once.A. if, WhetherB. if, IfC. whether, WhetherD. whether, If13. When they got to the cinema, the film _______ for the ten minutes.A．had been on B．has begun C．began D．had begun14. The teacher says _______ she will leave a message on the headmaster's desk.A．if B．who C．that D．what15. -Do you think ________ a concert in our school hall this weekend? -Yes, there will.A. there will haveB. there will beC. will there beD. will there have三、现在完成时专练（一）．现在完成时的构成：现在完成时由助动词have(has)+动词的过去分词构成。
主将从现例句
主将从现例句主将从现是指在时间状语从句或条件状语从句中，如果主句是一般将来时，从句要用一般现在时表将来。
以下是主将从现例句：1.If you get up at 6 o'clock, you will be able to catch the first bus to town. 如果你6点起床，你就能赶上第一班进城的公共汽车。
2.If it doesn't rain tomorrow, we will go for a walk. 如果明天不下雨，我们就去散步。
3.If she works hard, she will pass the exam. 如果她努力学习，她就会通过考试。
4.If you study hard, you will succeed. 如果你努力学习，你就会成功。
5.The dog will surely be very sad if its son gets lost。
如果他的儿子丢了这只狗肯定会很伤心。
6.I will stay at home if it rains。
如果下雨的话，我会待在家里。
7.Don't play computer games if you don't finish your homework.如果你没完成你的家庭作业就不要玩电脑游戏。
8.You may have an accident if you drive too fast.如果你来车太快很容易出事故的。
9.He will resign if the board does not approve his plan. 如果董事会不批准他的计划，他将辞职。
10.They will arrive on Friday if the flight is on time. 如果航班准时的话，他们将在星期五到达。
E04 主将从现
Ifpeople have problems , they shouldkeep them to themselves. 8上10
I don’t agree that they should return the treasure to Russia if they find it. B2-27
1.一般将来时※
Unlesswe talk tosomeone,we’ll certainlyfeel worse. 8上10p77
Iftheir numbers drop too low, itwill bring danger to allocean life.
Ifyou join the Lions, you’llbecome a great soccer player. 8上10
※
If you go toanother country, what kinds of thingswould you buy? 9全5p35
You should bequietwhen you arein the reading room.
Sharksmay disapearone dayif we don’t dቤተ መጻሕፍቲ ባይዱsomething to stop the sale of shark fins. 9全13P99
Assoon as youwake up, youmust goto the forest with your father. 8下p46
If theinterviewee agree,you canuse a recorder to get the facts straight. R5p26
when前后时态用法
when前后时态用法
when引导时间状语从句：表示有规律的，都用一般现在时；表示将来的事情，用主将从现；表示过去两个有先后的动作，都用过去式；表示一个动作正在进行（过去进行时），另一个动作插入（过去式）。
when引导的从句用什么时态
如果是宾语从句，那么时态问题就参考宾语从句的做法如果是时间状语从句，则基本有4种
1、表示有规律的，都用一般现在时如：Water turns into steam when we heat it.
2、表示将来的事情，用主将从现（主句将来时，从句一般现在时）如：I will tell him when he comes back.
3、表示过去两个有先后的动作，都用过去式如：When he came back, I told him the news.
4、表示一个动作正在进行（过去进行时），另一个动作插入（过去式）如：I met my teacher when i was walking in the street.这里我告诉你个记语法的秘密：背句子记语法。
初中英语主将从现练习题
主将从现主将从现是指在时间状语从句和条件状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。
常见的有以下四种情况：一、条件状语从句的主句是一般将来时，那么从句常常用一般现在时如：When I grow up, I’ll be a nurse and look after patients我长大后要当一名护士，照顾病人二、如果主句是祈使句，那么从句通常要用一般现在时如：Don’t laugh a t me when I make a mistake.我犯错误的时候不要笑话我。
三、如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时如：You should be quiet when you are in the reading room在阅览室时应保持安静四. 如果if的条件状语从句遇到变换间接和直接时, 祈使句应用not to....如; She said not to close the window常见的时间状语从句的连词有：as soon as,when,while ,as,until等主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。
例如：I will tell him about it when he comes.If it is fine tomorrow, we will go outing.如果主句的时态是过去将来时，那么从句要用一般过去时。
例如：He said that he would have another try if he had the chance.I knew he could help me if he was free the next day.任务设计任务I. 请用正确的形式填空。
1. If I come, I ________ ( see ) you.2. If it is fine, we______( go ) for a walk.3. If it rained, they _________ ( stay ) at home.4. You will spoil it if you ______ ( not be ) careful.5. We would be very much pleased if you _____( come ).6. Will you help me if I _____ ( need ) you.7. They will get wet if it _____ ( rain ).8. What a pity I haven’t got my car. If I had, I _________( take ) you to the airport.9. We would answer if we _____( can ).10. If you eat too much, you ______( get ) ill.任务II. 请根据给的线索将下列句子补充完整。
主祈从现的句子
主祈从现，若主句是祈使句或主句中有情态动词时，那么从句用一般现在时表示将来。
知识拓展：
条件状语从句和主句的时态主要有以下几种情况：
①主句用一般将来时，从句用一般现在时；（主将从现）
He will pick me up if he is not busy.
如果他不忙的话，他将会接我。
②主句句式为祈使句，从句用一般现在时；（主祈从现）
Close the window if you feel cold.
如果你感到冷的话，把窗户关上。
③主句含有情态动词，从句用一般现在时；（主情从现）
You can open the door if you feel hot.
如果你感到热的话，你可以把门打开。
④描述客观事实时，主句用一般现在时，从句用一般现在时；（主现从现）
Ice turns into water if you heat it.
如果你给冰加热的话，它会融化成水。
- 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)。
一般现在时练习题一、写出下列动词的第三人称单数形式1. work__________ read__________ clean__________ write__________2. teach__________ wash__________ guess__________ watch__________3. go__________ do___________ fix__________ carry_________4. study__________ fly__________ cry__________ play__________5. have__________一．动词时态填空：1. We often______(play) in the playground.2. He _____(get) up at six o’clock.3. _____you often ______(brush) your teeth every morning.4. What (do) ______he usually (do)______ after school?5. Danny _____(study) English, Chinese, Maths, Science and Art at school.6. Mike sometimes ________(go) to the park with his sister.7. At eight at night, she __________(watch) TV with his parents.8. ________ Mike________(read) English every day?9. How many lessons _________your classmate________(have) on Monday?10. What time _________his mother_________(do) the housework?二．按要求改句子1. Do you often play football after school? (肯定回答)2. I have many books. （改为否定句）3. Gao Shan’s sister likes playing table tennis （改为否定句）4. She lives in a small town near New York. （改为一般疑问句）5. I watch TV every day. （改为一般疑问句）6. David has got a goal. （改为一般疑问句）7. We have four lessons.（否定句）8. Nancy doesn’t run fast （肯定句）9. My dog runs fast.（否定句和感叹句）六、根据要求完成句子1、这个老人每天早上六点钟起床。
The old man _____ _____ at six o’cl ock in the morning every day.2、你从哪里来？Where _____ you from? 或Where _____ you _____ from?我从美国来。
I _____ from America. 或I _____ from America.英语一般将来时练习题:( ) 1. There __________ a meeting tomorrow afternoon.A. will be going toB. will going to beC. is going to beD. will go to be( ) 2. Charlie ________ here next month.A. isn’t workingB. doesn’t workingC. isn’t going to workingD. won’t work( ) 3. He ________ very busy this week, he ________ free next week.A. will be; isB. is; isC. will be; will beD. is; will be( ) 4. There ________ a dolphin show in the zoo tomorrow evening.A. wasB. is going to haveC. will haveD. is going to be( ) 5. –________ you ________ free tomorrow?– No. I ________ free the day after tomorrow.A. Are; going to; willB. Are; going to be; willC. Are; going to; will beD. Are; going to be; will be ( ) 6. Mother ________ me a nice present on my next birthday.A. will givesB. will giveC. givesD. give( ) 7. – Shall I buy a cup of tea for you?–________. （不，不要。
）A. No, you won’t.B. No, you aren’t.C. No, please don’t.D. No, please.( ) 8. – Where is the morning paper?– I ________ if for you at once.A. getB. am gettingC. to getD. will get( ) 9. ________ a concert next Saturday?A. There will beB. Will there beC. There can beD. There are( ) 10. If they come, we ________ a meeting.A. haveB. will haveC. hadD. would have( ) 11. He ________ her a beautiful hat on her next birthday.A. givesB. gaveC. will givingD. is going to giving( ) 12. He ________ to us as soon as he gets there.A. writesB. has writtenC. will writeD. wrote( ) 13. He ________ in three days.A. coming backB. came backC. will come backD. is going to coming back( ) 14. If it ________ tomorrow, we’ll go roller-skating.A. isn’t rainB. won’t rainC. doesn’t rainD. doesn’t fine( ) 15. – Will his parents go to see the Terra Cotta Warriors tomorrow?– No, ________ （不去）.A. they willn’t.B. they won’t.C. they aren’t.D. they don’t.( ) 16. Who ________ we ________ swimming with tomorrow afternoon?A. will; goB. do; goC. will; goingD. shall; go( ) 17. We ________ the work this way next time.A. doB. will doC. going to doD. will doing( ) 18. Tomorrow he ________ a kite in the open air first, and then ________ boating in the park.A. will fly; will goB. will fly; goesC. is going to fly; will goesD. flies; will go( ) 19. The day after tomorrow they ________ a volleyball match.A. will watchingB. watchesC. is watchingD. is going to watch( ) 20. There ________ a birthday party this Sunday.A. shall beB. will beC. shall going to beD. will going to be( ) 21.________ you ________ free next Sunday?A. Will; areB. Will; beC. Do; beD. Are; be( ) 22.He ________ there at ten tomorrow morning.A. willB. isC. will beD. be( ) 23 It ________ the year of the horse next year.A. is going to beB. is going toC. will beD. will is( ) 24 ________ open the window?A. Will you pleaseB. Please will youC. You pleaseD. Do you( ) 25 –Let’s go out to play football, shall we?– OK. I ________.A. will comingB. be going to comeC. comeD. am coming答案：主将从现常见的主将从现的词有as soon as,when,while ,as,until等一、单项选择( ) 1. If you want to learn English well, you must use it as ___ as possible.A. oftenB. longC. manyD. soon ( ) 2. ---What will Bill do if he ____in the test?---He will try again.A. failB. failsC. will failD. is failing( ) 3. Please tell her the news when she_____. OK, I will.A. comesB. will come.C. comeD. would come( ) 4. The students will plant trees if it ___ tomorrow.A. didn’t rainB. hasn’t rainedC. won’t rainD. doesn’t rain( ) 5. We__ home if there is no bus. ---Oh, what a pity!A. will walkB. have walkedC. walkedD. walk( ) 6 . If it _____ tomorrow, I’ll go by car.A. rainB. will rainC. rainsD. would rain( ) 7. If Mary _______ next Sunday, we will go boating together.A. will comeB. comesC. shall comeD. should come( ) 8. --- Don’t forget to ask him to write to me.--- I won’t. As soon as he _______, I’ll ask him to write to you.A. will comeB. cameC. comesD. is coming( ) 9. --- _____ the young girl _____ the old man clean his room every day?--- Yes, she does.A. Does; helpB. Has; helpedC. Did; helpD. Do; helps( ) 10. --- What does Linda often do in the evening?--- She often _______ her homework, but on the evening of March 12 she _______ TV.A. does; watchesB. is doing; watchedC. does; watchedD. is doing; was watching二、用动词的正确形式填空1. If I come, I _______________ ( see ) you.2. If it is fine, we________________( go ) for a walk.3. If it rains, they ______________ ( stay ) at home.4. You will spoil it if you ______________ ( not be ) careful.5. We would be very much pleased if you _______________( come ).6. Will you help me if I _______________ ( need ) you.7. They will get wet if it __________________ ( rain ).8. What a pity I haven’t got my car. If I had, I __________________( take ) you to the airport.9. We would answer if we __________________( can ).10. If you eat too much, you __________________( get ) ill.三、请根据给的线索将下列句子补充完整。