为什么动词后有的接sb to do sth 有的接sb do sth?

为什么动词后有的接sb to do sth 有的接sb do sth?

使役动词和感观动词后接sb do 如,let sb do make sb do have sb do
see sb do hear sb do watch sb do notice sb do
其它动词后接sb to do 如 ask sb to do tell sb to do want sb to do warn sb to do
help sb to do allow sb to do 等.

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