have助動詞用法
1、（加過去分詞，構成完成時態）已經；曾經
have/has done現在完成時； had done過去完成時；will have done將來完成時；would have done過去將來完成時；have/has been doing現在完成進行； had been doing過去完成進行。
They haven't finished the job yet.
他們尚未完成該項工作。
2、（用于虛擬語氣，表示與過去事實相反的假設）（假如那時）……的話
She might have come if she hadn't been so busy.
當時若不是那么忙，她是可能來的。
have動詞用法
1、有，擁有
This coat has no pockets.
這件衣服沒有口袋。
注意：have “有，擁有”，其疑問和否定形式有兩種，如：
Do you have a brother? No, I don’t have a brother.
2、懷有，持有
Many people have doubts about the new project.
許多人對這項新工程有懷疑。
3、體驗；經驗；患
We had a wonderful time on the beach.
我們在海灘上玩得好極了。
4、拿；得到，取得
We gave him a present, but he wouldn't have it.
我們給他一件禮物,但他不肯接受。