when句型,when后面加do还是doing

when句型,when后面加do还是doing

03. when句型(1) be doing sthwhen 例：He was still smiling when the door opened and his wife came in. 他正笑着的时候门突然开了，他妻子走了进来。2) be about to do 一、When +简单句这种句型中，when表示时间，意为“当……时”，后面接一个简单句，表示某个动作发生的时间。例如：When I woke up this morning, it was already 8 o'clock.(

when的四个精华句型(1) be doing sth --- when --- 例：He was still smiling when the door opened and his wife came in.他正笑着的时候门突然开了，他妻⼦⾛了进来。2) be doing sth…when;be about to do sth…when;had not done sth…when;had just done…when;had not done sth…hardly…when。1、be doing sth…when…例：H

when的用法四种句型如下：1、when可指时间点，又可指时间段，从句中可用延续性动词，也可用非延续性动词。2、表示主when句型(1) be doing sthwhen 例：He was still smiling when the door opened and his wife came in. 他正笑着的时候门突然开了，他妻子走了进来。2

3、when句型：(1) be doing sth --- when --- 例：He was still smiling when the door opened and his wife came in. 他正笑着的时候门突然开了，他妻子走了进The morning is when I am busiest.早上是我最忙的时候.I have no idea when the game will begin.我不知道比赛何时开始.I don't know when the plane takes off

when的用法when可以用作副词、连词和代词，其中副词可用作疑问副词、连接副词和关系副词等；连词可用作从属连词和并列连词等；用作代词位于介词之后。when的句型1、be doing sth…wh从句中为be动词，用when;when说明从句的动作和主句的动作可以是同时发生，也可以是先后发生。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。1when的用法句型1.be