定語從句中的關(guān)系代詞有that, which, who, whom, whose等。其中，who whom 可指人，which可指物，whose，that可代替人或物。我們都知道關(guān)系代詞在句中主要是代替先行詞是人或物的名詞或代詞，表達(dá)該先行詞的意思，有著主語，賓語，定語的作用。
1.在從句中作主語

A.The young man who came in just now is a lecturer.
剛才進(jìn)來的年輕男士是個(gè)學(xué)者。

B. Here comes the good news. The team who won the basketball game is from Class two.
好消息傳來了。贏得籃球比賽的這支隊(duì)來自二班。

C.Visitors that come from different places are deeply attracted by the scenery there.
來自不同地方的參觀者深深地被這兒的景象所吸引。

2.在從句中作定語
A.Fortunately，I eventually live in a house whose(of which) rent is lower.
幸運(yùn)的是，我最終住在了一個(gè)費(fèi)用較低的房子里。

B. The old man whose son is an excellent artist is kind.
這個(gè)熱心老人的兒子是個(gè)杰出的藝術(shù)家。

3.在從句中作賓語，其中關(guān)系代詞前有介詞時(shí),指人用whom
A.She is the star with whom you have talked is the one I admire.
你所談?wù)摰乃褪沁@個(gè)我所崇拜的明星。（不可用that）

B.This is the watch which he found at the shop yesterday.
這是他昨天在商店找到的表。

C.Can you tell me where is the man that I saw from the picture?
你能告訴我從圖片上看到的這個(gè)人在哪嗎？

4.在從句中作表語,此時(shí)主要是that作為關(guān)系代詞修飾先行詞
A.This is a best age that we wish it to be.
這是我們希望的最好的時(shí)代。（that在be 作表語）