when和while

when和whileTag内容描述：<p>1、when和while的用法和区别while和when都是表示同时，到底句子中是用when还是while主要看从句和主句中所使用的动词是短暂性动作（瞬时动词）还是持续性动作。1、若主句表示的是一个短暂性的动作，而从句表示的是一个持续性动作时，两者都可用。如：He fell asleep when while he was reading. 他看书时睡着了。I met him when while I was taking a walk in the park. 我在公园散步时遇到了他。2、若主、从句表示两个同时进行的持续性动作，且强调主句表示的动作延续到从句所指的整个时间，通常要用 while。如：Dont talk while youre eatin。</p><p>2、一）、when，while都有“当时候”的意思。when既可表示某一点时间，也可以表示某一段时间 。在when引导的时间状语从句中，其谓语动词可以是延续性的，也可以是非延续性的，可与主句中的谓语动词同时发生，也可在其后发生。例如：1、I was just reading a book when she came into my room. 她走进我房间时，我正在看书。 2、Were you writing when the teacher came in? 老师进来的时候，你在写信吗？ 3、When he was a child he was always trying out new ideas. 他小时候就常常试验一些新的设想。 （二）、while只能表示某一段时间，不。</p><p>3、when和while用法区别专项练习讲解三例句：1. The girls are dancing while the boys are singing.2. Kangkangs mother is cooking when he gets home.3. When/While Kangkangs mother is cooking, he gets home.一、用when或者while填空1.______Margowastalkingonthephone, hersisterwalkedin.2.______wevisitedtheschool, thechildrenwereplayinggames.3.______Sarahwasatthebarbers。</p><p>4、when和while的区别 when是at or during the time that, 既指时间点，也可指一段时间； while是during the time that，只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。 when 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。 由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引。</p><p>5、讲解三例句：1. The girls are dancing while the boys are singing.2. Kangkangs mother is cooking when he gets home.3. When/While Kangkangs mother is cooking, he gets home.一、用when或者while填空1.______Margowastalkingonthephone, hersisterwalkedin.2.______wevisitedtheschool, thechildrenwereplayinggames.3.______Sarahwasatthebarbers, Iwasgoi。</p><p>6、1) when表示“当的时候”， 从句中既可以用延续性动词， 表示状态或时间段， 也可以用非延续性动词， 表示动作或时间点； while表示“当 的时候”、“在期间”， 从句中只能用延续性动词， 表示状态或时间段。例如： It was snowing when we arrived at the station. When he came in， we all stood up， smiling I was very fat when / while I was a child When / While she was typing， someone knocked at the door (2)在when或while所引导的状语从句中， 如果从句的主语和主句的主语相同， 且动词又是be动词时， 从句的主语和be动。</p><p>7、when 和while的用法区别 when是at or during the time that, 既指时间点，也可指一段时间； while是during the time that，只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。 when 说明从句的动作和主句的动作可以是同时，也可以是先后发生；while 则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。 由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用whi。</p><p>8、As, when, while意为although（尽管），but（但是），seeing that（鉴于）1. 只有在形容词+as+主语+to be/to seem/to appear这一结构中，as才意为though/although（尽管）：百合Tired as he was he offered to carry her.相当于：Though he was tired he offered to carry her.尽管他很累了，他还主动提出要背着她。Strong as he was, he couldnt lift it.尽管他力气很大，他仍提不起这个东西。2. While可意为but, 用于表示强调对比：Some people waste food while others havent enough.一些人糟蹋食物而另一些人却食不果腹。While可以意。</p><p>9、when、while引导时间状语从句时的区别练习题用when或者while填空1.______Margowastalkingonthephone, hersisterwalkedin.2.______wevisitedtheschool, thechildrenwereplayinggames.3.______Sarahwasatthebarbers,Iwasgoingtoclass.4.______IsawCarlos,hewaswearing。</p><p>10、李华蓉老师 过去进行时中的when和while,湖南省石门县澧斓中学,rammar,What was Jay Chou doing at 8 this morning? He was ,He was running.,from 8 to 9 yesterday morning,She was having a Chinese class.,When Jim called him up,When Jim called him up, he was sleeping.,While Tom walked to school,While Tom walked to school, he was eating.,?, I was walking to school when I saw a cat in a tree. When Sally arrived home, her mother was cleaning the house. 主句的动作是持续性的，而从句动作是短暂性的，此时用 ______。</p><p>11、李华蓉老师 过去进行时中的when和while,湖南省石门县澧斓中学,rammar,What was Jay Chou doing at 8 this morning? He was ,He was running.,from 8 to 9 yesterday morning,She was having a Chinese class.,When Jim called him up,When Jim called him up, he was sleeping.,While Tom walked to school,While Tom walked to school, he was eating.,?, I was walking to school when I saw a cat in a tree. When Sally arrived home, her mother was cleaning the house. 主句的动作是持续性的，而从句动作是短暂性的，此时用 ______。</p>