現在進行時

    ——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”講時沒有進行時