定语从句引导词知识点
一,定语从句中只用that的情况
1.当先行词被序数词或形容词最高级修饰
2.当先行词被the only/the very/the last 修饰
3.当先行词既有人又有物
4.当先行词被不定代词修饰或本身即是不定代词all,each,little,few,much,none,neither,something,anything,nothing,everything.ect.
5.以who或which开头的疑问句
Eg.who(whohas common sense )can do such things ?
二,定语从句中不用that的情况
1.逗号之后
2.介词之后
三.定语从句中as的用法
1.当先行词前有as,so,such,the same修饰时,用as引导
2.当先行词本身即是such,the same时
3.as 表正如,正像
Eg.He is doing the same as you are doing. The same as 同一类
The same that同一个
四.定语从句中as和which的区别
1.都可引导非限定性定语从句,都可指先行词或这个句子
2.Which引导的句子不放句首,as可前可后
3.as 表正如,正像,which不能
注意:1.定语从句引导词无论在人称单复数还是意思上都与先行词保持一致。
2.定语从句引导词必须充当成分,但坚决不用what
3.定语从句中引导词充当宾语时通常可省,但是逗号之后介词之后不省。
五.定语从句的主谓一致问题
1.定语从句引导词做主语时,从句谓语动词与先行词一致。
2.当先行词是one of+c.n(pl)且引导词做主语时,谓语动词用复数,但是one以前有the
only ,the very限定时,谓语动词用单数。 Eg.1.Do you know the girls who
----are----singing?
2.He is one of the students who are good at basketball.
3.He is the only one of the students who is good at basketball.
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