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现在进行时
——表示现在正在进行的动作
构成主语+be动词+动词的现在分词+其它成分
We are having lunch.
He is reading a book.
The dog is running after a cat.
The boys are swimming across the river.
★变疑问句将be动词移到句首
Are we having lunch?
Is he reading a book?
Is the dog running after a cat?
Are the boys swimming across the river?
★变否定句在be动词后面加 not
We are not having lunch.
He is not reading a book.
The dog is not running after a cat.
The boys are not swimming across the river.
★特殊疑问句what, which, how, where, who, etc.
疑问词+动词+主语+现在分词
What are you doing?
What is she doing?
What is the dog doing?
没有进行时的动词(必背)
表示状态，思想，感情和感觉的动词不能表示正在进行的动作
表示感觉，感官的词
see, hear, like, love, want
have, has当“拥有”讲时没有进行时
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