that與which兩者都可指物，?？苫Q。其區(qū)別主要在于：

1. 引導(dǎo)非限制性定語(yǔ)從句時(shí)，通常要用which。如：She received an invitation from her boss, which came as a surprise. 她收到了老板的邀請(qǐng)，這是她意想不到的。

2. 直接放在介詞后作賓語(yǔ)時(shí)，通常要用which。如：The tool with which he is working is called a hammer. 他干活用的那個(gè)工具叫做錘子。

3. much, little, none, all, few, every(thing), any(thing), no(thing) 等時(shí)，通常用that。如：There was little that the enemy could do but surrender. 敵人無(wú)法,只有投降了。All [Everything] that can be done must be done.? 凡能that can be done must be done.

4. 當(dāng)先行詞有the very, the only, the same 等修飾時(shí)，通常用that。如：This is the only example that I know. 我知道的例子只有這一個(gè)。Those are the very words that he used. 那是他的原話。

5. 當(dāng)先行詞有形容詞最高級(jí)或序數(shù)詞(包括last, next等)等修飾時(shí)，通常用that。如：。如：This is the best dictionary that I’ve ever used. 這是我用過(guò)的最好的詞典。The first thing that you should do is to work out a plan. 你應(yīng)該做的第一件事是訂個(gè)計(jì)劃。

6. 當(dāng)關(guān)系代詞在定語(yǔ)從句中用作表語(yǔ)時(shí)，通常用that。如：China is not the country (that) it was. 中國(guó)已不是過(guò)去的中國(guó)了。

7. 當(dāng)先行詞是一個(gè)既指人又指物的并列詞組時(shí)，通常用that。如：They talked about the persons and things that most impressed them. 他們談?wù)摿耸顾麄冇∠笞钌畹娜撕褪?。他們談?wù)摿耸顾麄冇∠笞钌畹娜撕褪隆?

8. 當(dāng)要避免重復(fù)時(shí)。如：Which is the course that we are to take? 我們選哪門課程？