時間狀語從句用法解析
1.引導時間狀語從句的引導詞有:①表示某個時刻發生的動作:when、while、as、once ②表示某個時刻之前發生的動作:before、until
③表示某個時刻之後發生的動作:after、since
2. when引導從句時,主從句的動作有先有後,也可以同時進行,從句的動作可以是持續性的,也可以是短暫的。
eg. When I go to the cinema, the movie had already started. (主先從後)(短暫性)
When I watched movie, I used to eat ice cream. (同時) (持續性)
When the movie ended, the people went back. (從先主後)
3. while側重主從句動作的對比,且從句的動詞必須是持續性的。
eg. While we were chatting she was reading comic.
4. as引導從句時側重主從句動作同時或幾乎同時進行,從句的動作可以是持續性的,也可以是短暫的。
eg. Sometimes I watch TV as I am having breakfast.
5. 關於when的固定搭配:
①…was/were doing…when…(正在做…突然)
②…was/were about to do…when…(剛要做…突然)
③…was/were on the point of doing…when…(剛要做…突然)
④…had just done…when….(剛一…就)
⑤Hardly/Scarcely had…done…when…(剛一…就)