一．关系代词引导的定语从句 1.who指人,在从句中做主语 (1) It’s a person who works in a hospital. (2) The boys who are playing football are from Class One. (3) Yesterday I helped an old man who lost his way. 2. which指物,在定语从句中做主语或者宾语,做宾语时可省略 (1) It’s an animal which has eight legs and eats flies. (2) Football is a game which is liked by most boys. (3) This is the pen (which) he bought yesterday. 3. where指地点,在定语从句中做地点状语 (1) It’s a place where you buy books. (2) Shanghai is the city where I was born. (3) The house where I lived ten years ago has been pulled down. 4. that指人时,相当于who；指物时,相当于which.在宾语从句中做主语或者宾语,做宾语时可省略. (1) Doctor is someone that/who helps sick people. (2) The number of the people that/who come to visit the city each year rises one million. 二．直接疑问句和间接疑问句 间接疑问句（Indirect Questions ）。 1. 间接一般疑问句的疑问部分主语和动词不需要倒装.另外,疑问部分由if与主句连接,如: 直接一般疑问句:Is it raining ？ 间接一般疑问句:He asked if it was raining. 2. 间接特殊疑问句 间接特殊疑问句由特殊疑问词将主语与问句连接起来. 如: (a) 直接特殊疑问句: Why do you come so late ？ 间接特殊疑问句:Mary wanted to know why she came so late. (b) 直接特殊疑问句:Where are you going ？ 间接特殊疑问句:He asked me where I was going. **我们通常使用如下短句：I don’t know…/ I can’t remember… / I have forgotten…/ Can you tell me… 本文来源：https://www.wddqw.com/doc/1706ffcd82c758f5f61fb7360b4c2e3f572725aa.html