Question

do you have to do this 和Have you to do this

Answer 1

其实两种都对的.下面听我解释：

Have you to do this 这种说法,现在已经很少说了,教科书上基本看不到,但是,have to也可以作为do动词,也就是说,可以单独把have to提前.这样的用法,在10多年前是很流行的,只是现在不多说了.

do you have to do this 这种我就不多说了,就是最常见的说法.

不管是do you have to do this 还是 Have you to do this

两者意思都是一样,就是 你一定要这么做吗?