Don‘t I know this question?
以否定形式开头，例如can’t，don‘t，won't等，其他的跟一般问句差不多？
Does he not know English?How don't he know English?
I don't know about this thing?
He did not understand English? How come he doesn't understand English?
Why don't I konw that?
He didn't konw English ,did he? Why didn't he know English?
吧be动词提前，或用助动词……
he don't know english? how can it be?
或者how can't he know english.
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