表示現在正在進行的動作。
構成：主語+be動詞+動詞的現在分詞+其它成分（現在分詞的構成見附錄）
We are having lunch。
He is reading a book。
The dog is running after a cat。
The boys are swimming across the river。
★變疑問句將be動詞移到句首
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動詞後面加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。
★特殊疑問句：what， which， how， where， who， etc。
疑問詞+動詞+主語+現在分詞
What are you doing？
What is she doing？
What is the dog doing？
沒有進行時的動詞（必背）
表示狀態，思想，感情和感覺的動詞不能表示正在進行的動作
1、表示感覺，感官的詞
see， hear， like， love， want，
2、have， has當”擁有”講時沒有進
