used to do be/get used to doing be used for be used to do 的区别 加上例句

be used for 被用来做
it is used for cleaning.
used to do 过去常常做
i used to water flowers.
be/get used to doing 习惯做
i am used to live here.
be used to do 被用来做
it is used to aweep the floor.