高中英语语法-as,which非限定性定语从句说明

在英语的学习中同学们要对语法进行了解，打好英语学习的基础。下面学大为大家提供的是高中英语语法-as,which非限定性定语从句说明，希望同学们能够在英语的学习中取得进步。

首先，as和which都可以表示主句在意义上的连贯，在从句中作主语，或用作及物动词的宾语，如：

He married her， which/as was natural.

I was very useful to him， which as he realized.

但下列情况下as和which一般不能互换：

1.as既可以指前面提到过的事实或情况，因此as可以放在句首、句末，也可以插入主句中，而which指前面提到的事实或情况，一般放在主句之后(有时也可用as)，如：

As our teacher points out， that book is of benefit to everyone.

Heat is a form of energy， as is known to all of us.

This machine， as might be expected， has stopped operating.

2.as含有正如、按照、正像之意，as一般用在肯定句中，而which则 多用于含否定意义的句子中，如：

He failed in the exam again， as was expected.

He failed in the exam again， which was unexpected.

3.当定语从句所修饰的主句内容是谓语动词的对象时，常用as，如：

Jack was admitted into the university， as we had expected.

4.下列固定结构，一般不能用which，如：

as has been said before 如前所述

as often happens 正像经常发生的那样

as is well known 众所周知

as will be shown in Fig 3 将如图3所示

as we know 正如我们知道的那样"

as may be imagined 这可以想象得出来

as we all can see 正如我们大家看到的那样

5.当关系代词代表主句引起的结果，又做主谓宾补(svoc)结构中的主语时，多用which，如：

He saw the girl， which delighted him.

He didn't pass the exam， which made his mother angry.

6.在从句中作介词宾语时，用which，如：

We didn't go to the film， instead of which we went to the theatre.

7.在从句中作定语时，常用which，如：

I told her to see a doctor， which advice she took.

8.在从句中代表主句中的谓语的整个概念时，常用which，如：

He can write a letter in English， which I can not.

9.指代主句中一个名词时，多用which，如：

I gave him an interesting book， which he started to read at once.

10.代替主句中的形容词时，常用which，如：

He thought me impatient， which he himself was.

练习(判断正误)

1.Her performance was wonderful， which we had expected.

2.He told us a joke， which made all of us laugh.

3.As is well known to us all that the earth is round.

4.Metal will bear beating with a hammer， as a stone will not.

5.He was emigrated(移居)in 1948，at which time there was much hardship and unrest.

6.Mum always treats me just like a baby， as I can't bear.

7.Lincoln was shot in a theatre， which was described in this book.

8.His children asked him to go for a row with them in the afternoon， which he promised.

9.This book， as is imagined， is very good.

10.Dorothy was always speaking highly of her role in the play， which， of course， made the others unhappy.

keys：

1.×2.√3.×4.×5.√6.×7.×8.√9.√10.√

同学们在英语的学习中要对基础知识进行了解，上文学大为大家提供的是高中英语语法-as,which非限定性定语从句说明，希望大家了解。