新加坡AEIS考试试卷中你可能会遇到的关系代词which和as的区别

　　我们在新加坡AEIS入学考试前，AEIS语法真题的练习不能少，争取做到每天十道的练习量，当然更多也是可以的，在新加坡AEIS考试时我们就要沉稳，认真的观察出AEIS语法考题的解题思路，通过回想平常所学习的AEIS语法考点来解答题目。为了提高考生们新加坡AEIS考试成绩，AEIS考试在线为大家解析关系代词which和as的区别。

　　我们都知道，which和as都可以引导非限制性定语从句，有时可以互换使用。但两者的用法又有所不同。何时用which，何时又必须用as?是不是有些傻傻分不清?!

　　(1)位置上，as可放在句首、句末，也可插入主句中;which一般放在主句之后(有时也可用as)：

　　As we all know, reading is very important.

　　Reading is very important, which we have already known when we were very young.

　　(2)意义上，as有正如、按照、正像之意，一般用在肯定句中;which可用于含肯、否定意义的句子中：

　　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)固定结构，用as：

　　as has been said before as often happens

　　as is well known as we all can see

　　the same...as such...as

　　(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：

　　He passed the exam, which made him delighted.

　　(6)在从句中作介词宾语时，用which，如：

　　They went to the zoo, after which they saw a film.

　　(7)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 cannot.

　　(8)指代主句中某一名词时，多用which，如：

　　Beijing, which he was born, is our capital.

　　(9)代替主句中的形容词时, 常用which，如：

　　Lily thought me clever, which she herself was.

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