Modal verb: I have to study Grammar all the time.
Present perfect: I have been in Dalat for twenty years. She has been..........
Present perfect continuous: I have been eating She has been eating.
Causative: I have my car serviced
If -clause; If I have time, I'll go with you
If I had time , I would go with you
If I had gone by car, I would have saved time
Bare infinitive: Let's have a look about your translation
Infinitive: I try to have a good pronunciation
Imperative; Have a nice day
And a lot of kinds of sentences such as It's isn't necessary that she have a lot of advices to him,. you needn't have gone to the office yesterday.....
Phuong ninh