[初中]全新英語語法17-5 習慣上要用that引導定語從句的5種情況

用一個句子作定語，這個句子就叫定語從句。定語從句通常緊靠在它所修飾的名詞或代詞后面。定語從句相當于一個形容詞，用來修飾名詞、代詞或句子。

17-5 習慣上要用that引導定語從句的5種情況

that引導定語從句，既可以指人，相當于who，也可以指物，相當于which，但下列5種情況通常用that而不用who或which。

1.先行詞為指物的不定代詞或被不定代詞修飾時

當先行詞是指物的all，little，few，much，any，anything，everything，nothing，none，the one時，或先行詞被all，little，few，much，any，every，no等修飾時用that不用which。如：

All that can be done has been done.能做的都已經(jīng)做了。

He will tell you everything that he heard about it .他將告訴你他所聽到的關(guān)于這件事的一切。

There is little work that is fit for you .沒什么工作適合你做。

I have eaten all the food that is left .我把剩下的所有食物都吃了。

2.先行詞為序數(shù)詞、最高級或被序數(shù)詞、最高級修飾時

當先行詞是序數(shù)詞或最高級形容詞時，或者先行詞被序數(shù)詞（包括last，next）、最高級形容詞等修飾時用that不用which。如：

This is the first film that I have seen since I came here .這是我到這里后所看的第一場電影。

This is the best method that has been used against pollution .這是用來防止污染的最好辦法。

3.先行詞包括人和物時

當先行詞包括人和物兩項時用that不用who或which。如：

They often talk about the people and the things that they are interested in .他們常常談論那些他們感興趣的人和事。

4.主句為who或which開頭的疑問句時

當主句是以who或which開頭的疑問句時，為了避免重復，多用that引導。如：

Which is the house that caught fire last night ？昨晚失火的是哪座房子？

Who is the lady that is playing the piano ？在彈鋼琴的那位小姐是誰？

5.先行詞被the only，the very，the same等修飾時

當先行詞被the only，the very，the same，the right等修飾時，用that不用which。如：

He is the only boy that is invited .他是唯一的一個被邀請的男孩。

This is the very book that I am looking for .這正是我一直在尋找的那本書。