which与as引导非限制性定语从句的异同
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which与as引导非限制性定语从句的异同
which与as引导非限制性定语从句的异同
which与as一样,都可以引导非限制性定语从句,它们既有相同之处,也有差别。因此在实际运用中容易混淆。它们的某些用法在高考中也会考查。
一.相同点。
两者引导非限制性定语从句时,可指代主句中的部分或整个句子的内容,在从句中做主语,宾语或表语,位于主句之后有时可互换。 The meeting was put off, as /which was exactly what we wanted. He was a doctor, as/which I knew from his manner.
二. 不同点
1. as可指其前后主句提到的事实或情况,因此引导的非限制性从句位置比较灵活,which可以放在主句前后,也可插入主句之中;而which引导的非限制性从句只能位于主句之后。
As is known to all, fish can’t live without water.
Air, as we know, is gas.
2.在非限制性从句中,which后的be动词不可省;as而后的be动词可以省略。
She told me she won the match , which was a lie.
The material is elastic, as (was) shown in the figure.
3. which在非限制性定语从句做主语时可用各类动词做谓语;而在非限制性定语从句做主语时,谓语常用连系动词,如be, seem, become等,一般不用其他行为动词。
which与as引导非限制性定语从句的异同
He saw the girl, which delighted him.
He didn’t say anything at the meeting , as/which seemed very strange.
4. 如果主句中叙述的事情与从句所涉及的意向一致,多用as,用以对主句的意义进行补充;如果不一致,就用which
She has married again, as was expected.
He broke the rules again, which was unexpected.
5.如表示“如同。。。那样,按照,正如”含义,常用as,这里as主要起与上下文联系的作用,表达说话人的看法,并指出内容,出处和根据等,常用的结构有as we know(众所周知)as often happens(正如常发生的那样)as is often the case(情况常常如此)as we all can see(正如我们看到的)be+announced/expected/known/imagined/mentioned/said/shown/reported(正如所。。。)等。这些结构常放句首,偶尔也可以放句中或句末 As is known to all, China is a developing country.
Kate was late for school , as often happened.
6.在非限制性定语从句中关系代词指代主句中某一个单词时,常用which
My brother enjoyed playing basketball , which he really plays well. Beijing , which he was born in, is our capital.
7.在非限制性定语从句中“介词+关系代词(介宾代物)”中关系代词只能用which
The Travel Agency, with which our company has been dealing for several
which与as引导非限制性定语从句的异同
years, has opened for new branches
Air is a mixture of gases, of which oxgen forms 21 percent.
8.有时用case, point, time, situation或reason等抽象名词来总结主句的内容,可用“介词+ which +抽象名词”构成从句
Ten years of hard work changed her greatly , for which reason he could hardly recognise her at first sight.
The machine may be out of order , in which case it will be repaired at once.
9.在非限制性定语从句关系代词用以代表主句中谓语的整个概念,从句中的谓语动词是否定形式时,常用which
He can write a letter in English, which I can not.
Metal will bear beating with a hammer, which a stone willl not
10.在非限制性定语从句关系代词代表前面主句中的宾语从句时,常用which
He said he had passed the exam , which was untrue.
1.The owner of the cinema needed to make a lot of improvements and employ more people to keep it running ,____meant spending tens of thousands of pounds.
A.who B.that C.as D.which
2.Jim passed the driving test,____surprised everybody in the office.
A.which B.that C.this D.it
3.The road conditions there turned out be very good,____was more than
which与as引导非限制性定语从句的异同
we could expect.
A.it B.what C.which .that
4.Mark was a student at this university from 1999 to 2003,____he studied very hard was made Chairman of the Students’ Union.
A.during which time B.for which time .during whose time D.by that time
5.The Science Museum ,______we visited during a recent trip to Britain , is one of London’s tourist attractions. A.which B.what C.tha tD.where
6.The Beatles,_____many of you are old enough to remember, came from Liverpool.
A.what B.that C.how D.as
7.______I expained on the phone , your request will be considered at the next meeting.
A.When B.After C.Wha tD.Since
8.___is often the case, we have worked out the production plan.
A.Which B.When C.What D.As
9. ____has been announced , we shall have our final exams next month.
A.That B.As C.It D.What
10. ____is reported in the newspaper, talks between the two countries are making progress.
A.It B.As C.That D.What
which与as引导非限制性定语从句的异同
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