be/get used to doing sth.表示习惯于做某事或习惯于某事,to是介词,后面要跟名词、代词或动名词；
used to do sth.则表示过去常常,to后跟原形动词。
例句
She was used to her mother\'s histrionics.
她习惯了母亲装腔作势的样子。
They\'re used to stretching their budgets.
他们习惯于精打细算。
My ole man used to work there.
我老爸曾在那儿做事。
I used to play dominoes there.
我过去常在那里玩多米诺骨牌游戏。
