she has to go to the supermarket to buy some milk.对 to buy some milk提问为什么要用.does.have.

问题描述:

she has to go to the supermarket to buy some milk.对 to buy some milk提问
为什么要用.does.have.

to 表示目的,to 后面要加原形,to do sth,即为了干甚么事情