I hear she is here today(she was here yesterday/ she will be here tomorrow.)
He said he was watching TV(he had swept the floor/ he would play football after school)。
Our teacher told us that light travels faster than sound.
Lin Tao thought(that)the TV play was very boring.
David asked his mother if/ whether she liked the dinner last night.
3. 当宾语从句是由特殊疑问句变化而来时,原句中的疑问词充当连接代词(如who, whose, what, which)或连接副词(如when, where, why, how),引导宾语从句。例如:
Do you know what we can do on the island?
I don’t know why Jane was late for school this morning.
When did he leave? I want to know. →I want to know when he left.
Does the shop close at six every day? Do you know? →Do you know if/ whether the shop closes at six every day?
当主句的谓语动词为think, believe, suppose等动词,且主语为第一人称时,从句的否定要转移到主句上。例如:
I don’t believe he is here on time, is he?
I don’t think Tom is the best student in his class, is he?