2023年初中英语动词知识点：助动词
2023-01-09 18:51:52佚名
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助动词
助动词本身没有意义，只能和主要动词一起构成各种时态、语态、语气等动词形式，表示否定，疑问等结构中的谓语动词。常用的助动词有：shall, will.have, should, would, do, be等。
I don't know where he is.(否定句)Do you have a dictionary with you? (疑问句)I have been to Shanghai twice.(现在完成时)There will be a meeting tomorrow morning.(一般将来时)
