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英语非谓语_ two years to looking after her mother ,she badly need

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英语非谓语
_ two years to looking after her mother ,she badly needed a holiday .A.having devoted B.devoting 为什么不能选B
英语非谓语_ two years to looking after her mother ,she badly need
因为这个句子的原句是,After she had devoted 2 years to looking after her mother,she badly needed a holiday.意思是在她投入了2年去照顾她母亲后,她太需要一个假期了.需要假期是过去时,投入去照顾应该发生在过去的过去,强调发生在过去的过去,则应该用过去完成时,也就是had devoted.过去完成时改出来的现在分词做状语就应该是A的模式.