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魔法英语语法:第一章 动词时态 (3)

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Five minutes later, he was standing at the door, smoking.   5分钟后，他已站在门口抽着烟。   The baby was crying hard, and suddenly the crying stopped.   这婴儿在大声啼哭，突然，哭声停止了。   c. 用来陈述原因或用作借口   She went to the doctor yesterday. She was having a lot of trouble with her heart.   她昨天去看病了。她患了很严重的心脏病。   I haven't finished my homework because I was helping my mother at home all day yesterday.   我作业没做完是因为我昨天一直帮妈妈在家干活。   d. 与always, constantly等词连用，表示感情色彩   The girl was always changing her mind.   这女孩老是改变主意。   In the past he was constantly asking me for money.   过去他总是向我要钱。   3．过去进行时与一般过去时的区别   ①一般过去时往往表示某一动作已经完成，而过去进行时却表示动作在持续或未完成。

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