have的用法，为什么有时用过去式，但有时

have的用法，为什么有时用过去式，但有时

助动词have以及它的变体has, had等的主要用法如下：

1.have +过去分词，构成完成时态。如：

We’ve just done the washing-up.我们刚洗完碗碟。

Poor Jim has just had an accident.可怜的吉姆刚出了个事故。

I have had this car for three years.这辆汽车我已用了3年了。

By the end of last month, they had finished the work.上月未他们就已经完成了工作。

2.have + been +现在分词，构成完成进行时。如：

I have been studying English for 8 years.我学英语已达八年了。

The children have been having a lot of run.孩子们一直玩得很开心。

We had been doing business with each other for years before we quarreled.在吵翻之前，我们多年来在业务上一直来往。

I woke up—I had been having a bad dream.我醒了，我做了个噩梦。

3.have+been +过去分词，构成完成式被动语态。如：

English has been taught in China for many years.中国教英语已经多年。