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1、初中英语知识归纳总结第十八课时 动词的时态(四)教学重点现在进行时 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。(1) 现在分词的构成变化规则例词一般情况直接加-ingdodoing help - helping以不发音的e结尾的,去-e加-ingtake-taking have - having 重读闭音节末尾只有一个辅音字母的,双写此辅音字母再加-ingstop - stopping set - settingbegin-beginning drop-drop
2、ping(3)现在进行时的用法。 表示说话时正在进行的动作。如:What are you doing ?Who are you waiting for ?Im cooking 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 look now. 表示不断重复的动作。如:The boy is always asking some strange questions.The children are singing and dancing. 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,
3、 come, leave, fly, start等。如:When are you starting ?Im 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 wa
4、s watering the garden, it began to rain.I was watching TV.I was writing while my mother was cooking.教学难点: 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.当我在花园浇水时,突然下雨了。While we were having a party, the lights went out. 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. “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。 过去进行时与一般过去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.