罗嘉良人品:The parents asked their son _______ play in the street.

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The parents asked their son _______ play in the street.
A.don't
B.doesn't
C.not to
D.not
我选的是D,可答案是C。
到底是C还是D,为什么?

C
ask sb. to do sth. 是要求某人做某事
它的否定式是:
ask sb. not to do sth. 要求某人不要做某事

同理可证:
tell sb. to do sth.-tell sb. not to do sth.