一般过去时就是:Did I have a book? I did not have a book. I did have a book!
Did I like Chinese food? I did not like Chinese food. I did like Chinese food!
在非强调的肯定句里,不需要用助动词do, 那怎么表示动作的时间呢?让它体现在表义动词上。 这就是为什么表义动词有现在的形式和过去的形式。
Will I go to China? I will not go to China.
Would I go to China? I would not go to China.
表示将来的其他词汇手段还有:
1) To be going to + 动词原形,所有的时间和式的变化都由 be 担任。疑问和否定也都体现在be 上。
I am going to buy the book. I was going to buy the book. I would be going to buy the book. Am I going to buy the book? I am not going to buy the book.
2) 用进行式表示: I am going to Shanghai next month.
3)to be to + 动词原形
4)用现在时表示常规性的安排:(上午说)This train leaves for Beijing at 2pm.
现在进行:He is walking. 过去进行:He was walking.
疑问:Is he walking? Was he walking?
否定: He is not walking. He was not walking.
现在完成:He has eaten the apple. 过去完成:He had eaten the apple.
疑问:Has he eaten the apple? Had he eaten the apple?
否定:He has not eaten the apply. He had not eaten the apple.
It is best (that)
It is crucial (that)
It is desirable (that)
It is essential (that)
It is imperative (that)
It is important (that)
It is recommended (that)
It is urgent (that)
It is vital (that)
It is a good idea (that)
It is a bad idea (that)
to advise (that)
to ask (that)
to command (that)
to demand (that)
to desire (that)
to insist (that)
to propose (that)
to recommend (that)
to request (that)
to suggest (that)
to urge (that)