As it was obvious that not even a West African lorry-driver could be successful in driving while crouched under the dashboard.请问while后省略了什么?为什么要用crouched,而不是crouching?不是说当从句的主语与主句的主语一致时,从句可以省略主语,但是从句的谓语动词要用动词ing形式吗?
还有while+过去分词作状语的用法啊,但是过去分词作状语不是应该过去分词作状语放前面,然后逗号隔开,再放主句吗?迷惑ing
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