求几个短语的区别与用法look at look up look foward look around look out

求几个短语的区别与用法
look at look up look foward look around look out

look at:看
look up:查字典,向上看
look foward：盼望着……后面加doning或sth
look around：环顾四周
look out：小心,一般在很危险的情况下说,一般不加从句
基本上就是这些吧……