Question

what how when where which和in which的用法和区别 指什么时候加to,什么时候不加to

Answer 1

w疑问词后面接动词加to连接,如果更从句就跟句句子用不着To了

用法

1:

i don not know what to do

i don not how to do it

2

i don't know where the girl is

i don't know in which the girl is

(where 主要和in which 荣誉混淆）

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