silly和stupid和foolish区别?

foolish指“无头脑的”、“缺乏常识的”、“缺乏判断能力的”.例如：
It was a foolish thing to pick a fight with his neighour.和他的邻居找碴儿打架是一件蠢事.
He is foolish to throw away such a chance.他真蠢,丢掉了这么一个机会.
It is foolish of you to say so (you are foolish to say so).你说这话真蠢.
Stupid指“智力差的”、“反应迟钝的”.例如：
Mary made a stupid mistake.玛丽犯了一个笨拙的错误.
He is very stupid in learning maths.他学数学很笨.
Henry is too stupid to understand such a complicated problem.
亨利太笨了,他不理解这么复杂的问题.
Silly指“头脑简单瓣、不懂事的”、“傻头傻脑的”.例如：
Don’t be silly!别傻!
Stop asking such silly questions!别再问这样傻的问题了!
It was silly of you (You were silly)to trust him.你真傻竟相信了他.
Silly有时带感情色彩.例如：
You silly child.你这个傻孩子.（并无太多的贬意）
概括起来,foolish相当于汉语的“愚蠢”,stupid相当于“笨”,silly相当于“傻”.
另外,我们也用fool这个词.Fool是个名词,意思是“*”（常指先天性的智力不全者）.例如：
Don’t act like a fool.别像一个傻瓜似的.