1.I think that you are right.
2.I don't know what they are doing.
3.Please tell me what he did yesterday.
4.I want to know if/whether he is a student.
5.Do you know if/whether they play football every day?
找出下列句子中的错误并改正.
came改成will come;因为tomorrow是将来时间,故用一般将来时.
或者:将tomorrow改成yesterday,这样就与came的时间关系一致了.