1.be used to do“被用來做……”

　　Wood is often used to make desks and chairs.木頭常常被用來制作桌椅。

　　Computers can be used to do a lot of work now.如今電腦可用來做許多事。

　　2.be used to doing“習慣于……”

　　I am used to cleaning the room.我習慣于打掃房間

　　You are used to playing game.我習慣玩游戲

　　She is not used to eating Chinese food.她不習慣吃中餐。

　　3.used to“過去常常”

　　經常與be used to do進行辨析，表示過去的習慣性動作，過去如此，現在不再這樣了，譯為“過去常�！�。例如：

　　He used to play basketball when he was young.他年輕的時候常常打籃球。

　　There used to be an apple tree here.過去這兒曾經有棵蘋果樹。

　　He used to get up early.過去他經常早起。