新概念英语第一册的语法:新概念英语第一册语法知识梳理：现在进行时

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：
　　1. 表示感觉，感官的词
　　see, hear, like, love, want
　　2. have, has当“拥有”讲时没有进行时

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