be used to do 过去常常;被用来做there is no use doing 做什么没有作用1 use ... to doeg: We use our eyes to see.2 used to doHe used to get up early. 他过去早起。3 be/ get used to doingHe is getting used to getting upearly 他习惯于早起。4 be used to do = be used fordoing 用来做…Keys are used to open the door.used to do sthbe used to doing sthmake use of used to doused to dobe/ get used to doingmake use ofbe used to doget used to do sth.