have既是助动词也是动词。作动词时有“有；持有；占有；由……组成；显示出，带有（性质、特征）”的意思。作助动词时与过去分词连用构成完成时。
have助动词用法
1、（加过去分词，构成完成时态）已经；曾经
have/has done现在完成时 had done过去完成时will have done将来完成时would have done过去将来完成时have/has been doing现在完成进行 had been doing过去完成进行
They haven&39;t finished the job yet.
他们尚未完成该项工作。
2、（用于虚拟语气，表示与过去事实相反的假设）（假如那时）……的话
She might have come if she hadn&39;t been so busy.
当时若不是那么忙，她是可能来的。
have动词用法
1、有，拥有
This coat has no pockets.
这件衣服没有口袋。
注意：have “有，拥有”，其疑问和否定形式有两种，如：
Do you have a brother? No, I don’t have a brother.
Have you a brother? No, I haven’t a brother.
2、怀有，持有
Many people have doubts about the new project.
许多人对这项新工程有怀疑。
3、体验；经验；患
We had a wonderful time on the beach.
我们在海滩上玩得好极了。
4、拿；得到，取得
We gave him a present, but he wouldn&39;t have it.
我们给他一件礼物,但他不肯接受。
5、进行，从事（某事）
The manager is having a meeting.
经理正在开会。
6、吃；喝；吸（烟）
They had their lunch in a cafeteria.
他们在一家自助餐厅吃了午饭。
7、邀请（某人），招待
We had some guests for dinner last night.
我们昨晚请了几位客人吃饭。
8、（用于否定句中）容忍；允许
I won&39;t have anyone smoking in here.
我不容许任何人在这里抽烟。
9、生得，生育
My wife is going to have a baby.
我妻子快要生孩子了。
10、使，让；招致
I&39;ve had the stove lighted.
我已经让人把炉子点着了。
11、要；叫；使
I&39;ll be proud to have you read it.
你肯读它我会感到骄傲的。
12、必须,不得不
I have to go right now.
我马上得走。
13、明白，懂得
I guess I have your ideas.
我想我明白你的意思。
