告诉我你的理由.答案是D不是只有have done sth.when…… 的句型吗 I hadn’t been watching TV for half an hour —— my mother asked me to practice playing the piano this morning. Asince B while C after D when
从句是过去式时你那个句型主句应变为过去完成式,表示我看电视还没到半个点呢,我妈就叫我练琴。字典上when有一个意思是just after which一…就,刚…就,例句是He had just drifted off to sleep when the telephone rang 他刚睡着电话铃就响了。
此处when是:这时。。。突然。。。 此句型可以有几种变体,如: be going to do...when... be doing ...when.... had done...when... be on the point of doing ...when...等 此句意为:今天早上,我还没看到半个小时的电视突然妈妈就要我去练习弹钢琴了。