有do无to 怎么回事,这样的句型怎么回事,是什么句型,那【有TO无DO】呢,请举个例子说明

有do无to 是动词不定式结构省略to的情况，比如使意动词等动词引导的不定式结构，如help sb do, make sb do，see sb do.但这类词变成被动的时候不定式里的to 不能省略，要还原，如be made to do,be seen to do.
还有的情况是因为前面出现了do，后面就不用to，直接用do。如can do nothing but do.区别于 have no choice but to to.因为前面没有do，所以后面是用to do。
有to无do同样是省略句。如-Would you like to go to the party with me?
-Yes, I'd love to.这里后面省略了do，原形是I'd love to go to the party.

i can do it my myself
to my surprise,he is a boy

I can help you do you exercise, 无去就是那些后面不加不定式的动词。如help make等等，