形容詞性從句是在句子中起形容詞作用的從句。
形容詞性從句在復(fù)合句中可修飾主句的某個(gè)名詞性成分或修飾整個(gè)主句。
限制性定語從句與非限制性定語從句的對(duì)比

By 16:30,which was almost closing time,nearly all the paintings had been sold.
到16:30,結(jié)束營(yíng)業(yè)時(shí)間,幾乎所有的畫都賣出去了。
which引導(dǎo)的非限制性定語從句,修飾先行詞16:30,并在從句中作主語成分。
We live in an age when more information is available with great ease than ever before.
我們生活在一個(gè)可以比之前輕易獲取更多信息的時(shí)代。
when引導(dǎo)的限制性定語從句,修飾先行詞age,并在從句中作時(shí)間狀語。
關(guān)系代詞引導(dǎo)的定語從句

關(guān)系代詞用that不用which的情況
1、有兩個(gè)或兩個(gè)以上的先行詞兼指人和物
2、先行詞是all、anything、something、nothing、everything、none等不定代詞
3、先行詞被the first、the last、any、the only、few、little、much、no、some、the very修飾
4、先行詞被形容詞最高級(jí)修飾
The famous writer and his works that the radio broadcasts have aroused great interest among the students.
電臺(tái)里廣播的著名的作家和他的作品已經(jīng)引起了學(xué)生們的極大興趣。(情形1)
Agriculture has minimal effect on biodiversity,and any pollution (that) it causes is typically localized.
農(nóng)業(yè)對(duì)生物多樣性的影響非常小,農(nóng)業(yè)生產(chǎn)引起的任何污染都只不過是地區(qū)性的。(情形3)
that引導(dǎo)的限制性定語從句,修飾先行詞any pollution,并在從句中作直接賓語,關(guān)系代詞作直接賓語時(shí)可以省略。
關(guān)系代詞用which不用that的情況
1、關(guān)系代詞緊跟在介詞后面,只能用whom或which
2、which可引導(dǎo)修飾整個(gè)主句
3、非限制性定語從句不能用that引導(dǎo)
Jack has written two novels,both of which have been made into television series.
杰克已經(jīng)寫了兩部小說,這兩部都被拍成了電視劇。(情形1、3)
which引導(dǎo)非限制性定語從句,修飾先行詞novals,在從句中作介詞of的賓語。
關(guān)系副詞引導(dǎo)的定語從句

Between the two parts of the concert is an interval,when the audience can buy ice-cream.
音樂會(huì)的兩部分之間有間歇,這時(shí)候,觀眾可以去買冰激淋。
when引導(dǎo)非限制性定語從句,修飾先行詞interval,在從句中作時(shí)間狀語。
Sales director is a position where communication ability is just as important as sales skills.
銷售總監(jiān)是一個(gè)溝通能力和銷售能力同樣重要的職位。
where引導(dǎo)限制性定語從句,修飾先行詞position,在從句中作地點(diǎn)狀語。
Is there any particular reason why you can not come?
你不能來有什么特殊的原因嗎?
why引導(dǎo)限制性定語從句,修飾先行詞reason,在從句中作原因狀語。