問題錯(cuò)了吧,應(yīng)該是定語從句.
定語從句（Attributive Clauses）在句中做定語,修飾一個(gè)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.
18.1 關(guān)系代詞引導(dǎo)的定語從句
關(guān)系代詞所代替的先行詞是人或物的名詞或代詞,并在句中充當(dāng)主語、賓語、定語等成分.關(guān)系代詞在定語從句中作主語時(shí),從句謂語動(dòng)詞的人稱和數(shù)要和先行詞保持一致.
1）who,whom,that
這些詞代替的先行詞是人的名詞或代詞,在從句中所起作用如下：
Is he the man who/that wants to see you?
他就是你想見的人嗎?（who/that在從句中作主語）
He is the man whom/ that I saw yesterday.
他就是我昨天見的那個(gè)人.（whom/that在從句中作賓語）
2) Whose 用來指人或物,(只用作定語,若指物,它還可以同of which互換）,例如：
They rushed over to help the man whose car had broken down.那人車壞了,大家都跑過去幫忙.
Please pass me the book whose (of which) cover is green.請(qǐng)遞給我那本綠皮的書.
3）which,that
它們所代替的先行詞是事物的名詞或代詞,在從句中可作主語、賓語等,例如：
A prosperity which / that had never been seen before appears in the countryside.農(nóng)村出現(xiàn)了前所未有的繁榮.（which / that在句中作賓語）
The package (which / that) you are carrying is about to come unwrapped.你拿的包快散了.(which / that在句中作賓語）
〔定語從句〕介詞+關(guān)系詞
1）介詞后面的關(guān)系詞不能省略.
2）that前不能有介詞.
3）某些在從句中充當(dāng)時(shí)間,地點(diǎn)或原因狀語的"介詞+關(guān)系詞"結(jié)構(gòu)可以同關(guān)系副詞when 和where 互換.例如：
This is the house in which I lived two years ago.這是我兩年前住過的房子.
This is the house where I lived two years ago.
Do you remember the day on which you joined our club?還記得你加入我們俱樂部的那一天嗎?
Do you remember the day when you joined our club?
that的比用..先行詞是最高級(jí)