The parents asked their son _______ play in the street.

题目

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?

答案

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.