besides:意为除了....(还有),暗意指还有什么..
如:Besides English,I also love geography.
就是我除了喜欢英语,还喜欢地理.
except:就是除了....的意思
如:I love all the subjects except chemistry.
我喜欢所有科目,除了化学
except for:除了...(一般用于善意指出缺点)
如:The watch which you bought was nice except for its color.
你买的手表很好,除了颜色.....(暗意是指瑕疵)
请采纳。