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有关状语从句省略的问题:从句的动词不是be动词的时候应该怎么省略呢?

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有关状语从句省略的问题:从句的动词不是be动词的时候应该怎么省略呢?
我知道状语从句省略需要满足主从句主语一致,且从句的主要动词是be的某种形式,状语从句中从句的动词不是be动词的时候应该怎么省略呢?After she finished the housework,Polly had a walk with me.答案给的是:After finishing the housework,Polly had a walk with me .
不用想太多,只要搞清楚主动和被动.
例如,你的句子里面finishing 指代的是 she finished,这里状语从句就把主语she省略了,还有后面的主谓要一致,Polly 指代的就是she,才可以直接改成finishing.
如果是被动句,比如说After the housework was finished,Polly had a walk with me.
那这里改成状语从句就应该是After the housework being finished,Polly had a walk with me.