这就是妈妈一直在找的那条围巾。

　　e．当先行词既有人又有物时。

　　Can you tell me the people and events that you saw in Britain?

　　你能告诉我你在英国见到的人和事吗？

　　f．句子中出现过which或who之类的词，为了避免重复，要用that。

　　Which of the books that had pictures was worth reading?

　　哪本有图画的书值得读呢？

　　③在限制性定语从句中只用which不用that的情况：

　　a．先行词为that, those时，用which，而不用that。

　　What's that which is under the desk?

　　在桌子底下的那东西是什么？

　　b．关系代词前有介词时，一般用which，而不用that。

　　This is the room in which he lives.

　　这是他居住的房间。

　　[即时演练1]　用 that 或 which 填空

　　①(2016·浙江高考改编)Scientists have advanced many theories about why human beings cry tears, none of which has been proved.

　　②(重庆高考改编)We'll reach the sales targets in a month which/that we set at the beginning of the year.

　　 ③(陕西高考改编)Please send us all the information that you have about the candidate for the position.

　　④Do you have anything that is important to tell me?

　　⑤A shop should keep a stock of those goods which/that sell best.

　　⑥Edison built up a factory which produced things that had never been seen before.

　　⑦This is the family which/that is planning to move to the party.

　　⑧Could you lend me the book which/that you bought yesterday?

　　(2)who 和whom 的用法

　　who 和 whom 指人， who 在从句中可作主语和宾语，whom 在从句中作宾语。

　　There is a girl who wants to see you.

　　有个女孩儿想见你。

　　The old man who/whom you saw yesterday is a thinker.

　　你昨天见到的那位老人是位思想家。

　　(3)whose的用法

whose既可指人也可指物，在从句中修饰名词作定语，相当于所修饰成分的前置所有格。它可以转化为"the＋名词＋of which/whom" 和"of which/whom＋the＋名词"的形式。