兩者均可表示轉(zhuǎn)折或?qū)Ρ龋鉃椤暗恰被灯健ⅰ翱墒恰薄ⅰ叭欢钡冉跻啵袇^(qū)別
1. 表示轉(zhuǎn)折時(shí)舶替，but 是連詞。
He is young but very experienced.
他雖年輕杠园，但經(jīng)驗(yàn)很豐富顾瞪。
He has three daughters but no sons.
他有3 個(gè)女兒，但沒有兒子抛蚁。
He likes sports, but his wife likes music.
他喜歡運(yùn)動(dòng)陈醒，而他妻子則喜歡音樂。
2. however 表示“然而”瞧甩、“可是”時(shí)钉跷，有的詞書認(rèn)為它是連詞，有的詞書認(rèn)為它是副詞肚逸。之所以將其視為副詞爷辙，也許是因?yàn)橄裨S多副詞一樣不僅能位于句首，而且能位于句中(注意前后使用逗號(hào))吼虎，甚至句末 (注意其前也用逗號(hào))
Later, however, he changed his mind.
可是他后來(lái)改變了主意犬钢。
He hasn't arrived. He may, however, come later.
他還沒有到，不過他等會(huì)兒可能會(huì)來(lái)思灰。
He said that it was so; he was mistaken, however.
他說(shuō)情況如此玷犹，可是他錯(cuò)了。
注：以上各例中的 however 不能換成 but洒疚，但可用 but 來(lái)改寫歹颓。
He said that it was so, but he was mistaken.
他說(shuō)情況如此，可他錯(cuò)了油湖。
3. 當(dāng)連接兩個(gè)句子時(shí)巍扛，其前通常應(yīng)用分號(hào)，或另起新句乏德。
It's raining hard; however, I think we should go out. / It's raining hard. However, I think we should go out.
雨下得很大撤奸，但我想我們還得出去吠昭。
注：上例中的 however 不能換成 but，但可用 but 來(lái)改寫 (注意所用標(biāo)點(diǎn)的變化)胧瓜。
It's raining hard, but I think we should go out.
