I used to play dominoes there.

　　我過(guò)去常在那里玩多米諾骨牌游戲。

　　I used to play here as a boy.

　　我小時(shí)候常在這里玩。

　　I eat lots less than I used to.

　　我比以前吃得少多了。

　　I used to have to wear braces.

　　我以前不得不戴牙箍。