but however though的区别 but和however的区别

　　but 是连词,连接两个并列句,中间用逗号隔开.表示转折

　　如： I wanted to buy a book, but I don't have enough money.

　　though 是副词,但在句中的成分相当于连词.引导从句,不能与but 连用,可以放句首或者句中.意思是尽管

　　如：Though it is so hot I have to go outside.

　　I have to go outside though it is so hot.

　　however 也是副词,剧中成分相当于连词.可以放在句首或句中,后面一定要用逗号.表转折.放句首时,与前面的句子是转折的连接.放句首时,前后用逗号隔开

　　如：I wanted to buy a book, however, i do not have enough money.

　　辨析：but, however

　　but conj.可是，然而，但是，尽管……还是用来连接两个并列成分／分句.

　　however adv. 无沦如何，不论到什么程度，不过，然而.不能连接分句，必须用逗号分开，可以在句首，也可插在句中

　　Not one,but two！不是一，而是二！

　　He is young but very experienced.他虽然年轻，但是经验很丰富。

　　He has three daughters but no sons.他有三个女儿可是没有儿子

　　However did you get there？你是怎么到那里去的？

　　He hasn't arrived. He may，however，come later.他还未到，不过，他可能晚一会儿来

　　I'd like to go with you，however my hands are full.我很想和你一块儿去，可是我忙不过来