had加动词过去式是过去完成时。
had：
v.有持有占有由…组成显示出(性质、特征)
aux.had 有时代替 if 用于从句句首，表示某种情况可能发生但并未发生
have的过去分词和过去式 扩展资料
Number Ten had nothing to say on the matter.
唐宁街十号对此不作评论。
I went home directly I had finished work.
我一干完活就回家了。
We had relatively few applications for the job.
申请我们这项工作的'人相对较少。
The government had to take emergency action.
政府只得采取紧急措施
