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1、课题:Unit 5 What were you doing when the rainstorm came?难点名称:正确理解when和while引导的时间状语从句的区别1八年级-下册-unit5导入2状语状语- -谓语动词的状态,包括时间,地点,原因,方式,目的,结谓语动词的状态,包括时间,地点,原因,方式,目的,结果,让步,比较等。果,让步,比较等。She studies hard in the university every day.She studies hard in the university every day.在本句中在本句中hardhard就是方式状语,就是方式状语,in
2、 the universityin the university就是地点状语,而就是地点状语,而every every dayday是时间状语是时间状语She studied hard when she was three years old.She studied hard when she was three years old.在本句中在本句中she was three years old she was three years old 是由是由whenwhen引导的时间状语从句引导的时间状语从句在本节课中我们将学习在本节课中我们将学习whenwhen和和whilewhile引导的时间状
3、语从句有什么区引导的时间状语从句有什么区别。别。whenwhen的用法:的用法:1.I was just reading a book when she came into my room.2.Were you writing when the teacher came in?3.When he was a child,he was always trying out new ideas.通过观察例句我们发现通过观察例句我们发现when在引导时间状语从句,在引导时间状语从句,when后面的动词可以是后面的动词可以是时间点时间点,也可以是,也可以是时间段时间段,when后的动作可以跟后的动作可以
4、跟延续性动词延续性动词和和非延续性动词非延续性动词。whilewhile的用法的用法1.While Jim was mending his bike,Li Ming rang him.2.You cant do your homework while you are watching TV.3.Tom was cleaning the room while Jim was doing homework.通过观察例句我们发现通过观察例句我们发现while在引导时间状语从句时,表达某在引导时间状语从句时,表达某一一时间段时间段范围内的动作,因此范围内的动作,因此while后面的动作只跟后面的动作只
5、跟延续性动延续性动词词。在选择用在选择用when还是还是while的时候我们可以通过两种方式来判断的时候我们可以通过两种方式来判断第一种:看第一种:看动词动词:从句中的动词为:从句中的动词为短暂性动词短暂性动词(come,go,leave.die.open.borrow等),只用等),只用when不用不用while;第二种:看时态:强调主句动作和从句动作第二种:看时态:强调主句动作和从句动作同时发生同时发生;主从句的时态;主从句的时态都为都为进行时进行时的时候;只能用的时候;只能用while。1.-I phoned you this afternoon,but no one answered.
6、 -I was helping Tom with his Chinese at his home you phoned me.根据句意你给我打电话的时候我正在帮助汤姆补习中文,从句中根据句意你给我打电话的时候我正在帮助汤姆补习中文,从句中phoned为非延续性动词,因此,此处只能填为非延续性动词,因此,此处只能填when;2. 2. I was doing the washing in the house.I was doing the washing in the house. my my brother was playing with his pet dog in the garden.brother was playing with his pet dog in the garden.根据句意我正在家里洗碗,而我的弟弟正在花园里和狗一起玩。前根据句意我正在家里洗碗,而我的弟弟正在花园里和狗一起玩。前后两件事是同时发生的,主句和从句的动词后两件事是同时发生的,主句和从句的动词do和和play都是延续性动都是延续性动词,主从句都是过去进行时,因此此处只能用词,主从句都是过去进行时,因此此处只能用while同学们,学会了吗?练习挑战一下吧。同学们,学会了吗?练习挑战一下吧。小结小结小结小结谢谢聆听!