新概念英語語法總結(jié)：過去進行時

★這篇《新概念英語語法總結(jié)：過去進行時》，是特地為大家整理的，希望對大家有所幫助！
    過去進行時
    ——表示過去正在進行的動作，經(jīng)常用在when, while, as引導(dǎo)的狀語從句中。
    結(jié)構(gòu)：was/were+doing
    When my husband was going into the dining room this morning, he dropped some coins on the floor.
    Their father was watching TV while they were having dinner.
    ★變疑問句將be動詞移到句首
    Was their father watching TV while they were having dinner.
    ★變否定句在be動詞后面加 not
    Their father was not watching TV while they were having dinner.