英语中has/have要怎么区别

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has用于第三人称单数,表示实意动词“有”,助动词帮助构成完成时.
例如：She has 2 books.
She has done it twice.
have 用于一二人称,表示实意动词“有”,助动词帮助构成完成时.
I have a big house.
They have been scolded for chatting