I (had) answered the telephone.加had与不加had有什么区别?
I (had) answered the telephone.加had与不加had有什么区别?
He has answered the telephone.这里加has与不加has有什么区别?
i have had和 i had had 有什么区别?
Have后面加动词过去式和Had后面加动词过去式有什么区别?
I have had the cake for 3 days 这句话为什么加had?
had better do sth与had better to do sth用法有区别吗?什么区别?
had better后加动词什么形式
had gone和had been 有什么区别?
had done 和 had been done有什么区别啊?
had been found 跟had found有什么区别
had the job been 等于if the job had been done?如果各句加个i加在哪
had he cleaned the room yet与had he ever cleaned the room有什么区