如:While he was watching TV,he heard a knock at the door. 正当他在看电视时,他听到有人敲门。(可以用分词改写,因为两个主语一致。) (While)Watching TV,he heard a knock at the door.
注意:While he was watching TV, someone knocked at the door.正当他在看电视时,有人敲门。 (此句不可用分词替换从句,因为句中的两个主语不一致。)
As it was Sunday,they went out for a picnic. 从句与主句的主语不一致时,保留从句中的主语,再用分词改写:It being Sunday,they went out for a picnic. 这种用法属于独立主格结构。
三、短暂性动词的一般式也可表先后
分词有二种时态:一般式和完成式。一般式通常表示与主句的谓语动词所表示的动作无先后;完成式则强调分词所表示的动作先于谓语动词所表示的动作。如:While walking in the street,we met some friends of ours.(无先后)
Having done his homework,he turned off the light and went to bed.(做作业在关灯与上床睡觉之前)
但是Hearing the news,he jumped with joy. (hearing是一般式,但因为是短暂性动词,所以其一般式也可以表示先后,常是紧接着发生两个动作。此句若用完成式,反而显得听话者反应迟钝。
【高中英语语法-学习分词必须把握的七个方面之一】相关文章:
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