現(xiàn)在進(jìn)行時(shí)：表示現(xiàn)在正在進(jìn)行的動(dòng)作

　　構(gòu)成： 主語(yǔ)＋be動(dòng)詞＋動(dòng)詞的現(xiàn)在分詞＋其它成分

　　He is reading a book.

　　The dog is running after a cat.

　　The boys are swimming across the river.

　　變疑問(wèn)句將be動(dòng)詞移到句首

　　Are we having lunch?

　　Is he reading a book?

　　Is the dog running after a cat?

　　Are the boys swimming across the river?

　　變否定句在be動(dòng)詞后面加 not

　　We are not having lunch.

　　He is not reading a book.

　　The dog is not running after a cat.

　　The boys are swimming across the river.

　　特殊疑問(wèn)句：what, which, how, where, who, etc.

　　疑問(wèn)詞＋動(dòng)詞＋主語(yǔ)＋現(xiàn)在分詞

　　What are you doing?

　　What is she doing?

　　What is the dog doing?

　　沒(méi)有進(jìn)行時(shí)的動(dòng)詞

　　表示狀態(tài)，思想，感情和感覺(jué)的動(dòng)詞不能表示正在進(jìn)行的動(dòng)作

　　1. 表示感覺(jué)，感官的詞

　　see, hear, like, love, want,

　　2. have, has當(dāng)”擁有”講時(shí)沒(méi)有進(jìn)行時(shí)