Question

求解答过程：句型转换。 1. He

句型转换。 1. He ought to help his friend work out the problem. (改为否定句) _______________________________________________________ 2. Tom ought to go to join the party. (改为一般疑问句) _______________________________________________________ 3. Must we stay at home? (作否定回答) _______________________________________________________ 4. Our computer needs reparing. (改为同义句) _______________________________________________________

Answer 1

1. He ought not/oughtn't to help his  friend work out the problem. 2. Ought Tom to go to join the party? 3. No,you needn't/don't have to. 4. Our computer needs to be repaired.