直接引语如果是疑问句,变成间接引语后,叫做间接疑问句（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 或whether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 (whether) it was raining.

注意: whether 可与or not 连用,表示一种选择.而if 则不可.如:

He wants to know whether or not we want dinner.

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 going ？

间接特殊疑问句:He asked me where I was going.

注意: 当疑问词做宾语时,间接疑问句的语序不变,如:

(a) 直接疑问句:Who did you see yesterday ？

间接疑问句:Please tell me whom you saw yesterday.

(b) 直接疑问句:Which room do you prefer ？

间接疑问句:He wanted to know which room I preferred.