英语中 主将从现 是什么? 能详细一点的最好 希望有例子
1. 所谓“主将从现”是指在含有状语从句的复合句中，如果动作尚未发生，则从句一般用一般现在时（表示一般将来时），而主句则采用一般将来时。
2. 例如：
1）If I'm busy tomorrow, I won't call you up.
2) Unless it rains tomorrow, I'll go shopping with you.
在复合句中，由when ,as soon as ,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 do am/is/are
am /is/are going to do do/does
例：I’ll go to the zoo if it ________ tomorrow.
A. doesn’t rain B. will rain C. rains D. won’t rain (2005年甘肃省)
答案：A
I’ll give the note to her as soon as she back.(come)
答案：comes
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. study B. studies C. will study D. studied (2004年北京市)
2. We’ll go to visit Tian’anmen Square ________ it doesn’t rain tomorrow.
A. if B. as soon as C. when D. 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 have B. had C. won’t D. don’t have (2004 年长沙市)
4. Frank ______ to see his grandma if he ______ free tomorrow.
A. will come, will be B. comes, is
C. will come, is D. 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 come B. If he won’t come
C. If he will come D. 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 invited B. can be invited C. invited D. is invited (2004年安徽省)
7. Tomorrow is Sunday, Jim will go hiking with his friends if it __________ .
A. isn’t rain B. doesn’t rain C. won’t rain D. 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. rains B. rain C. raining D. will rain (2004年甘肃省)
9. Young man! If you _________ again, you’ll lose your job.
A. will be B. were C. are D. have been (2004年南宁市)
10. Can you play games with us when your homework _________ ?
A. is finished B. will finish C. finish
D. 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. if B. how C. before D. 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. until B. after C. when D. 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…If B. if …Whether C. when …Whether
D. 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. when B. since C. while D. until (2005年北京市)
15. Frank _______ a film if he’s free next Saturday.
A. see B. saw C. has seen D. will see (2005年北京市)
16. If Mr Smith ________ back, please let me know.
A. will come B. comes C. came D. 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, rains B. rains, will rain C. will rain, will rain (2005年哈尔滨市)
18. The sports meet will continue ________ it rains this afternoon.
A. if B. since C. as soon as D. 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 finish B. you will, finishes
C. you will, is finished D. you will, is finish (2005年辽宁省)
20. We won’t go to the park if it ________ tomorrow.
A. rains B. will rain C. 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
内容来源：《初中生学习技巧》
①一般将来时 ②一般现在时
will do am/is/are
am /is/are going to do do/does
例：I’ll go to the zoo if it ________ tomorrow.
A.doesn’t rain B.will rain C.rains D.won’t rain (2005年甘肃省)
答案：A
I’ll give the note to her as soon as she back.(come)
答案：comes
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.study B.studies C.will study D.studied (2004年北京市)
2.We’ll go to visit Tian’anmen Square ________ it doesn’t rain tomorrow.
A.if B.as soon as C.when D.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 have B.had C.won’t D.don’t have (2004 年长沙市)
4.Frank ______ to see his grandma if he ______ free tomorrow.
A.will come,will be B.comes,is
C.will come,is D.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 come B.If he won’t come
C.If he will come D.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 invited B.can be invited C.invited D.is invited (2004年安徽省)
7.Tomorrow is Sunday,Jim will go hiking with his friends if it __________ .
A.isn’t rain B.doesn’t rain C.won’t rain D.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.rains B.rain C.raining D.will rain (2004年甘肃省)
9.Young man!If you _________ again,you’ll lose your job.
A.will be B.were C.are D.have been (2004年南宁市)
10.Can you play games with us when your homework _________
A.is finished B.will finish C.finish
D.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.if B.how C.before D.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.until B.after C.when D.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…If B.if …Whether C.when …Whether
D.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.when B.since C.while D.until (2005年北京市)
15.Frank _______ a film if he’s free next Saturday.
A.see B.saw C.has seen D.will see (2005年北京市)
16.If Mr Smith ________ back,please let me know.
A.will come B.comes C.came D.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,rains B.rains,will rain C.will rain,will rain (2005年哈尔滨市)
18.The sports meet will continue ________ it rains this afternoon.
A.if B.since C.as soon as D.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 finish B.you will,finishes
C.you will,is finished D.you will,is finish (2005年辽宁省)
20.We won’t go to the park if it ________ tomorrow.
A.rains B.will rain C.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
内容来源：《初中生学习技巧》
仲孙满石斛： 主将从现就是指时间和条件状语从句中,表示将来的时候,主句用一般将来时,从句用一般现在时. 1、条件状语从句时态呼应为主将从现. 例:He will go to the park if it doesn't rain tomorrow. 2、时间状语从句的时态呼应为主将从现. 例:I will call you as soon as I get to the airport.
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