什么叫定語從句
導(dǎo)語：以下是小編精心為大家整理的有關(guān)定語從句的概念與用法，希望對(duì)大家有所幫助，歡迎閱讀。
定語從句概念
定語從句在句中作定語，修飾名詞或代詞，被修飾的名詞詞組或代詞即先行詞。定語從句通常出現(xiàn)在先行詞之后，由關(guān)系詞（關(guān)系代詞或關(guān)系副詞）引出。
關(guān)系代詞有：who,whom, whose, that, which等。
關(guān)系副詞有：when, where, why等。
先行詞+關(guān)聯(lián)詞+定語從句剩余部分
關(guān)系代詞的用法：
1. that 和which
that指人或物，作主語或賓語，作賓語可省略，主語不能。
Which指物，不指人，作主語或賓語，作賓語可省略，主語不能。
His father works in a factory that/which makes TV sets.
Who was hurt in the accident that/which happened yesterday?
The coat (which/that) I put on the desk is black.
注意：The room in which I live is very big. (在介詞后面不能用that)
2.只能用that不能用which引導(dǎo)的定語從句：
1) 先行詞被形容詞最高級(jí)修飾時(shí)，定語從句只能用that
This is the most interesting story (that) I have ever heard.
2）先行詞被序數(shù)詞修飾時(shí)，定語從句只能用that
The children like the second lesson that is about “The Football Match”.
3）先行詞被the only，the very 或the same等修飾，定語從句只能用that引導(dǎo)。
It is the only word (that) I know in the passage.
Where is the very book (that) I bought just now?
This is the (same) bicycle (that) I lost.
4）先行詞為everything，something，anything，all，none，much，little，few等不定代詞時(shí)，定語從句只能用that
I want everything (that) I want.
I am writing to tell you about something very strange that happened to me last week.
5)先行詞被不定代詞all, any, no, every, little, much, many修飾時(shí)，只能用that
Here is all the money (that) I have.
6)先行詞是同時(shí)含有“人和物”的`名詞時(shí)，定語從句只能用that
I can remember well the persons and some pictures (that) I see in the room.
7)定語從句所修飾的詞為the one 時(shí)，定語從句用that引導(dǎo)
Is it the one（that）you want？
8）為了避免重復(fù)，在疑問詞who之后，用that 引導(dǎo)定語從句
Who is the girl that won the first place?
3. who和whom
who指人，在句中作主語和賓語，作賓語可省略。
Whom指人，在句中只能作賓語，可省略，但在介詞后面不能省略。
Who is the teacher that Xiao Li is talking to?
The doctor with whom she went to the United States last month is very famous.
=The doctor who/whom/that she went to the United States with last month is very famous.
五.關(guān)系副詞的用法：
1. when指時(shí)間，在定語從句中作時(shí)間狀語
I still remember the day when I first came to Beijing. when=on which
2.where 指地點(diǎn)，在定語從句中作地點(diǎn)狀語。
This is the house where I lived two years ago.
3.why指原因，在定語從句中作原因狀語，其先行詞只有表示原因的reason一詞.
We don’t know the reason why he was late for school.
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