1. which引導(dǎo)的非限定性定語(yǔ)從句來說明前面整個(gè)句子的情況或主句的某一部分

2. 在引導(dǎo)限定性定語(yǔ)從句時(shí)，that有時(shí)相當(dāng)于in which, at which, for which或at which

Attitudes towards daydreaming are changing in much the same way that(in which) attitudes towards night dreaming have changed. 人們對(duì)白日做夢(mèng)的態(tài)度正在改變，這與人們對(duì)夜間做夢(mèng)的看法的變化有非常相似之處。

I like the music for the very reason that(for which) he dislike it. 我出于某種原因喜歡這種音樂，而他恰恰與我相反。

We arrived the day that(on which) they left. 剛好我們到的那天他們走了。

3. 有時(shí)as也可用作關(guān)系代詞

4. 在非限定性定語(yǔ)從句中，不能用that，而用who, whom代表人，用which代表事物。