1. fun 用法：Have fun; It is fun to do; What fun it is!
特殊注意：fun是不可数名词，表示乐趣；而funny则表示滑稽的。
2. furniture 用法：furniture是不可数名词，谓语动词用单数。
特殊注意：可以用a piece/set of furniture.
3. get 用法：get cold; get down to; get away; get close to, get hold of, get in, get off, get on, get rid of, get up
特殊注意：作使役动词时，不定式作宾语补足语时to不能省。如：Can you get him to pick me up at seven?
