be used to doing 强调现在习惯做某事
be used to do 是被动语态 “被用来做.”
还有一个短语used to do 是指过去常常做某事
例如：I used to swim in the river.我过去常常在河里游泳.
I am used to getting up early.现在我习惯于早起.
The knief can be used to cut apples.这把刀可以用来削苹果.