help yourself to some apples 为什么不是help yourself

Question

o have some apples
为什么不是help yourself to have some apples

Answer 1

help yourself to some apples 的意思是：
随便吃些苹果吧。
这是因为有固定短语搭配 : help oneself to sth, 随便吃些……吧

所以不可以在to 之后加 have.