【动词的时态(四)】
现在进行时 过去进行时
1、现在进行时
(1)现在进行时表示现在或现阶段正在发生或进行的动作。它是由“be + 动词的现在分词”构成。其否定句是在be之后加not。疑问句则将be提到主语之前。
(2)现在分词的构成
(3)现在进行时的用法。
① 表示说话时正在进行的动作。如:
What are you doing?
Who are you waiting for?
I’m cooking.
② 表示现阶段一直在进行的动作,但说话时不一定在进行。如:
He is working in a factory.
She is translating a book now.
③ 表示不断重复的动作。如:
The boy is always asking some strange questions.
The children are singing and dancing.
④ 表示位置移动的动词,可以用现在进行时表示将要发生的事。如go, come, leave, fly, start等。如:
When are you starting?
I’m leaving tomorrow.
2、过去进行时
过去进行时表示过去某一时刻正在进行的动作。
过去进行时常和表示过去的时间状语连用。如:this time yesterday, at that time, then, last night, at 9:00 yesterday, all night等。其构成和现在进行时类似,只需将be变为相应的过去式:was/ were + 动词-ing。如:
What were you doing this time yesterday?
When I was watering the garden, it began to rain.
I was watching TV.
I was writing while my mother was cooking.
难点:
① 过去进行时表示一个过去的动作发生时或发生之后,另一个过去的动作正在进行。过去进行时也可用来表示过去一段时间内持续发生的动作。如:
When I was watering the garden, it began to rain.
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While we were having a party, the lights went out.
② 过去进行时还可以表示两个过去的动作同时进行,这时可用连接词while引导。如:
George was reading while his wife was listening to the radio.
③“was going + 不定式”表示过去打算。如
He was going to be our team leader. 他原打算当我们的领队。
④ 过去进行时与一般过去时的区别
过去进行时表示在过去一段时间正在进行的动作,而一般过去时表示一个完成的动作。如:
I was typing letters last night.
I typed some letters last night.