状语从句
状语从句中在复合句中作状语。根据句子的含义,可表示时间,地点,原因,目的,结果,条件,行为方式,比较,让步等。
时间状语从句:
1.When,while,as区别
相同 表示当。。。时候,主句为短暂性动作,从句为延续性动作 I met Laura when/while/as I was walking along the street.
不同 When+非延续性动词及延续性动词
While常与延续性动词或表示状态的动词连用,“与。。。同时” While my wife was reading the book I was watching TV.
As表示“一边。。。一边。。。”随着。。。 He sang as he walked along.
2.表示一。。。就。。。短语类:as soon as scarcely…when hardly…when no sooner…than
名词类:the moment the minute the instant
副词类:immediately instantly directly
Time类:every time next time by the time each time
3.scarcely…when hardly…when no sooner…than用法:
搭配
时态:主过完had done从过did
语序:位于句首时,后面要部分倒装(主倒从不倒,即把had提到主语之前)
(二)条件状语从句
1.定义:在时间状语从句、条件状语从句中,主句表将来含义,从句一般现在时
2.连接词:if, unless,(除非)in case(万一),so/as long as(只要),on condition that(在。。。条件下), supposing/suppose/provided/providing/given,(that)(假定,假设)once(一旦);save that (只有。。。,除了。。。)
(三)让步状语从句
1.连接词:as (倒装),though(可倒可不倒),although(不倒装),while(尽管)用于句首
例如:Although/Though he works hard, he makes little progress.
Hard though/as he works, he makes little progress.
2.No matter+疑问词和疑问词+ever用法区别:都可引导让步状语从句,但只能用疑问句+ever引导名词性从句 例如:I believe whatever he said.
(四)结果状语从句
1.So…that, such…that
例如:He is so clever that everyone likes him.
He is such a clever boy that everybody likes him.
So+adj./adv.
Such+a/an+adj.+n.=so+adj.+a/an+n.
Such+adj.+可数名词复数
注意:名词前many,much,few,little等修饰时,表达数量,用so
(五)比较状语从句
标志词: than,as…as, not so/as...as, the+比较级。。。,the+比较级。。。
(六)原因状语从句
标志词: because, as, since,(因为) now that, in that(既然,由于) ,seeing/considering that,given that(鉴于,考虑到)
(七)方式状语从句
标志词:as if/as though好像,仿佛;as正如,按照
(八)目的状语从句
标志词:so that(为了。。。;目的是。。。),in order that(目的是)in case(以防)for fear(that),lest(唯恐,以防)
课后练习
单项选择
1.______ they visit the science museum, they showed great interest in everything they saw.
A.At the first time B.For the first time C.At first D.The first time
2. We can’t go swimming _________ our parents are with us. It’s too dangerous.
A.if B.when C.unless D.until
3. He has mountains of things to do, but I think he is talking ________ he had all the time in the world.
A.even if B.so that C.if ever D.as though
4. He is still too young to do the job ________ we want it done.
A.since B.while C.the way D.the moment
5. Language is so tightly woven into human experience __________ it is scarcely __________ to imagine life without it.
A.that...impossible B.that...possible
C.as...impossible D.as...possible
6. _________ the summer Mandarin program was supposed to be open to college students only, Marilyn charmed the program’s director enough with her language __________ that he made an exception.
A.When...fluency B.While...fluency
C.As...creativity D.Since...creativity
7. __________ that in rare cases, color migration may occur __________ the goggles are kept in contact with your swimsuits, caps, and towels for a long time.
A.Make sure...where B.Make sure...unless
C.Be aware...if D.Be aware...though
8. The world is ________ addicted to fattening foods as it is to fossil fuels and weight-loss drugs are ________ match for the might of big food.
A.so, no B.as, not
C.as, no D.so, not
9. With the COVID-19 outbreak improving in China, more and more people are willing to take a plane to go ______ the scenery is really appealing during the vocation.
A.as long as B.since C.where D.in case
10. She insisted on completing her degree _________ difficulties she faced.
A.whenever B.whatever C.wherever D.however
11. Please don’t call me during office hours it’s really necessary.
A.since B.as if C.unless D.as long as
12. Yesterday I bought a mobile phone for my sister ______ we could keep in touch any time.
A.so as to B.in order to C.in order that D.so as that
13. —What about taking a double-decker bus for a tour of the city
—OK, ________ it’s not crowded. Double-deckers are very popular right now.
A.as though B.in case C.as long as D.now that
14. ________ the reasons behind growing numbers of young people adopting a “lie down” approach to life, one thing is for sure — it is to be analyzed and addressed rather than dismissed.
A.However B.Whenever C.Whatever D.Whichever
15. The students stay quiet during the test ________ everyone can concentrate on their work.
A.as if B.even though C.in case D.so that
16. Mary shut the window just now she could keep the insects out.
A.so that B.when C.till D.after
17. We’d better hurry _______ it is getting dark.
A.even if B.so that C.as D.unless
18. ________ data leaks have become more common, worries about privacy are growing, and the chance _______ a person’s private details are at risk is getting higher.
A.Given that; whether B.Now that; that
C.But that; whether D.Except that; that
19. He is _________ that we all like him.
A.so a smart boy B.such a smart boy C.so smart boy D.such smart boy
20. He spends not so much time studying for his exams as he ________ video games on weekends.
A.does to play B.plays C.is playing D.does playing