Question

句型转换，求助

Answer 1

1.I wonder if / whether he likes his new desk.
2.I asked if/ whether they would start their work.
3. She didn't know if/ whether he loved music.
4.Mr. Croft wanted to know if/ whether they had learned Lesson 1.
这些句型转换是疑问句变宾语从句，在谓语动词后借助连词if/ whether , 疑问句变陈述句，主句时态为过去时态时，从句时态也要发生相应的变化，也就是对应的过去时态的某种形式:
一般现在时~一般过去时
一般将来时~过去将来时
现在进行时~过去进行时
现在完成时~过去完成时

Answer 2

I wonder if he likes his new desk.我想知道他是否喜欢他的新书桌