英语have,has,had,having,haven,havent用法
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发布时间：2022-04-22 09:17
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时间：2023-09-09 20:13
have非三单用法i have a book.
has三单she has a book.
had委婉或过去 you had better shut up. he had a book yesterday.
having进行分词 she is having breakfast now.
haven不存在
haven't助动词否定用法we haven't met each other before.
