1. 定語(yǔ)從句的概念

2. 定語(yǔ)從句的關(guān)系詞（關(guān)系代詞：who, whom, which, that, whose；關(guān)系副詞: when, where, why）

3. 關(guān)系詞的辨別：

4. 定語(yǔ)從句注意事項(xiàng)：

a. 用 that不用which的情況：

當(dāng)先行詞是不定代詞：all, little, few, much, something, anything, everything, nothing, none, some 等時(shí)

He did everything that he could to help us.

當(dāng)先行詞被all, every, no, some, any, little, much, the only, the very, the right, the last, just等修飾時(shí)

This is the only book the I want.

當(dāng)先行詞有序數(shù)詞或最高級(jí)修飾時(shí)（或先行詞本身就是序數(shù)詞或形容詞最高級(jí)時(shí)）

That is the most expensive hotel that we have ever stayed in.

當(dāng)先行詞既指人又指物時(shí)

The guests spoke highly of the children and their performances that they saw at the Children`s Palace.

當(dāng)主語(yǔ)是以who 或 that開頭的特殊疑問(wèn)句時(shí)

Who is the person that is standing at the gate?

b. 用which不用that的情況

關(guān)系代詞前有介詞且指物時(shí)

The pen with which you are writing is mine.

先行詞本身就是that時(shí)

What`s that which flashed in the sky just now.

c. 用who 不用that的情況

先行詞是指人的不定代詞， one，anyone，somebodym,those等時(shí)

Those who have good manners will be respected.

先行詞指人并含有較長(zhǎng)的后置定語(yǔ)或在被分割的定語(yǔ)從句中時(shí)

The boy was crying hard who lost his way while looking for his mother.

5. 定語(yǔ)從句中的主謂一致

One of + 名詞復(fù)數(shù)

The ( only) one of + 名詞復(fù)數(shù)

The very/ right +名詞復(fù)數(shù)