1. 1) be used for sth/ doing sth = be used to do sth 被用来做什么
Clothes are used for keeping warm.= Clothes are used _________ ___________ warm.
2) be used as 被用来当作、、、、
The box is used__________ a table.
Sticks were sometimes _________ _________ pens. 树枝有时被用来当笔。
3) be used by sb 被某人使用
English is used __________ travelers and business people all over the world.
4)sb be(get) used to doing sth 某人习惯于做什么事
