1.Wei Fang asked me whether/if I liked English.
2.The policeman wants to know whether/if I was at home before nine last night
3.I asked my teacher whether/if Tom had come back from Guangzhou
4.I want to know whether you can repair the TV set or not.
5.Could you tell us whether/if Mike can drive a car?
6.I asked the teacher whether/if Alice had worked out the problem herself
7.They didn’t tell us whether/if they were planting trees then.