——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