What did people use before paper__________?A.invented B.was inventedWhat did people use before paper__________?A.invented B.was invented可A为啥不行?
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What did people use before paper__________?A.invented B.was invented
What did people use before paper__________?
A.invented B.was invented
可A为啥不行?
before 后面引导的是一个时间状语从句,必须是完整的句子,所以,选B.
选A容易引起歧义,可以解读成:在被发明的纸张面前,人们用什么.这不合题意,
不知道这样的解释是否有助于理
此句中,before 后面所接的成分为时间点,因为句子的含义是 “在发明了造纸术前。。。”,虽然paper + invent 的这样组合,在非谓语动词的语法里是说的通的,可是你看,如果选A的话,before 后面的成分就是paper,而invent 就是作定语,意思是“人们发明的 纸张”。。。
这样语义是完全不通顺的~...
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不知道这样的解释是否有助于理
此句中,before 后面所接的成分为时间点,因为句子的含义是 “在发明了造纸术前。。。”,虽然paper + invent 的这样组合,在非谓语动词的语法里是说的通的,可是你看,如果选A的话,before 后面的成分就是paper,而invent 就是作定语,意思是“人们发明的 纸张”。。。
这样语义是完全不通顺的~
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before引导时间状语从句,后面必须是一个完整的句子,从句中paper作主语,是被发明,故用被动语态,A只能表主动的过去时,或者作后置定语
B,造纸术是被人们发明出来的,这里用被动
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