except,beside,in addition to,except for 的区别；谢了!

except是个介词,并且,后面的东西是【被排除在外的】.例如：I like all of my classmates except Henry.所有的同学我都喜欢,但是亨利是【被排除的】.
except for 基本上跟except 意思是一样的,但是它的后面还可以接一个由that 所引导的从句.例如：
She is pretty except for the fact that her eyes are too small.besides是个副词,而且,它所提到的东西,是【被同时概括进去的】例如：He can play many kinds of musical instruments, besides, he sings well.他除了会很多乐器之外,他还很会唱歌.唱歌这事,是被【涵盖进去的】
in addition to 的定义,跟besides 是一样的,也是被涵盖进去的范围,但是它的后面必须接名词.因为to 是介词.例如：
In addition to singing, she can also cook well.