现在进行时PPT课件课件
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现在进行时1.概念:表示现在正在发生的动作;表示现阶段正在进行的动作;用现在进行时表将来。
2.构成:主语+be(am/is/are)+ 动词-ing+其它E.g. I am reading a book.Look, he is doing homework.They are having lunch now.3.时间标志词:look / listen / now =at the moment / at once立刻、马上E.g. Look, Mr. Li is cooking.Mr. Li is cooking now.4.句型转换:肯定句:主语+be+动词-ing +其它,e.g. I am swimming in the river.否定句:主语+be +not+动词-ing +其它,e.g. I am not swimming in the river.一般疑问句:Be +主语+动词-ing+其它肯定回答: Yes, 主语+be否定回答:No, 主语+ be not.,e.g. Are you swimming in the river ?Yes, I am.No, I am not.特殊疑问句:特殊疑问词+一般疑问句What / how/ where /who /why/ which+ 一般疑问句E.g. They are swimming in the river.(对划线部分进行提问)Where are they swimming ?②They are swimming in the river.(对划线部分进行提问)Who is swimming in the river ?特殊疑问词做主语,谓语动词用单三。
5.现在进行时的用法:①表示现在正在进行:, e.g. My mother is sweeping the floor now .②表示现阶段:,I am writing a novel these days.这些天我正在写一部小说。