请问这几句英文对吗?(详解1.Idon'tknowhowtodotostopthebabyfromcrying.2.Idon'tknowhowtodoittostopthebabyfromcrying.3.Idon'tknowwhattodotostopthebabyfromcrying.

Question

请问这几句英文对吗?(详解
1.I don't know how to do to stop the baby from crying.
2.I don't know how to do it to stop the baby from crying.
3.I don't know what to do to stop the baby from crying.

Answer 1

1.判断：1错,2和3都正确.
2.
1）此题考查“疑问词 + 不定式”结构.
该结构相当于名词短语,在此三句中充当谓语动词know的宾语.
2）如果是“疑问代词 + 不定式”,则要求疑问代词充当后面不定式中某个动词或介词的宾语.
即如果用what开始此结构,what必须充当do的宾语,所以3对!
3）如果是“疑问副词 + 不定式”,则要求疑问副词充当后面不定式中动词短语的状语.
即如果用how,how充当例句中的方式状语,所以2对!
4）1错在不定式的动词do无宾语it,而how不能做宾语,只做do it的方式状语.