that 在限制性定語(yǔ)從句中既可指人又可指事或物。在以下幾種情況下，只能用 that 來(lái)引導(dǎo)定語(yǔ)從句：1. 當(dāng)先行詞被 all, few, little, much, every, some, no 等詞修飾或被 the only, the very, the same, the last 等限定詞修飾時(shí)。例如：These are all the pictures that I have seen. 這些是我見(jiàn)過(guò)的所有照片。This is the very dictionary that is of great help. 這就是那本對(duì)我非常有幫助的詞典。2. 當(dāng)先行詞是 all, much, few, little, everything, anything, nothing 等不定代詞時(shí)。例如：Is there anything that you want to buy? 你想要買些什么嗎？3. 當(dāng)先行詞既指人又指物時(shí)。例如：My father and his teacher talked a lot about the things and the persons that they could remember. 我父親和他的老師談?wù)摿嗽S多他們能記住的事物和人物。4. 當(dāng)主句是 who 或 which 引導(dǎo)的特殊問(wèn)句時(shí)。例如：Who is the girl that is standing under the tree? 樹下站著的女孩是誰(shuí)？Which is the machine that we used last Sunday? 上周日我們用的是哪臺(tái)機(jī)器？5. 當(dāng)先行詞被形容詞最高級(jí)或序數(shù)詞修飾時(shí)。例如：This is the best English film that I have ever seen. 這是我看過(guò)的最好的一部英文電影。The first English novel that I read was A Tale of Two Cities. 我讀的第一本英文小說(shuō)是《雙城記》。6. 當(dāng)關(guān)系代詞在定語(yǔ)從句中作表語(yǔ)時(shí)。例如：Our school is not the one that it used to be. 我們的學(xué)校不再是以前的那個(gè)學(xué)校。