when的用法四种句型时态例句,when的三种句型结构

when的用法四种句型时态例句,when的三种句型结构

when的用法四种句型：be doing sth…when;be about to do sth…when;hardly…when;had just done…when。1、be doing sth…when 例：He was still smiling whenwhen引导的三种时态：一般现在时、现在进行时、一般过去时。当when所引导的从句的主语和主句的主语一致时，常将其主语、系动词或助动词省去，只留实义动词或表语，或者改写为短语

when有时用before,常译为"是之前的"。It was 5 o’clock when he came here. It was the night before the composition was due. 12. It +be +段时间before一、When + 一般现在时这种句型常用于表示经常性的行为或者客观事实。例句：When it rains, the streets get slippery. (下雨的时候，街道会变得很滑。When

when的用法四种句型：be doing sth…when;be about to do sth…when;hardly…when;had just done…when。when的句型1.be doing sth…when…例：He was still smiling when the do4、when句型：(1) was/were ding sth -- when --- 例：He was still smiling when the dr pened and his wife ca

4、WhenIwasakid,Iwasverynaughty。5、例句：6、when:什么时候，何时，什么情况下，什么场合下。7、表示过去两个有先后的动作，都用过去式8、Whenisthebesttime例句如下：1、表示有规律的，都用一般现在时。Water turns into steam when we heat it.当我们把水加热时，它就变成了水蒸汽。2、表示将来的事情，用主将从现（主句将来时，从句一