However (但是,然而) 當連接詞,在 However之前加上(;)
He has faults; however,we love him. 他有缺點,但是我們喜歡他. 這是一完美(整)的句子.
I shall not oppose your design; I cannot, however, approve of it.
He is nice, but I don't like him.
but 在這,當反義連接詞,(Adversative Conjunction).用在連接前後兩個文法相同,意義相反,或相互對比的單字片...
He is stupid but persevering.
Fortune often knocks at the door, but the fool does not invite her in.
2009-02-16 15:17:22 補充：
However-反義的副詞連接詞,只能用來連接兩個子句,這些反義的副詞連接詞,... whereas, while, only, still, yet, and yet, but yet, 以及 nevertheless. 這些反義的副詞連接詞,也可以互用例如:
One the way to the station, we were delayed by heavy trafficc;(yet,stull,however,nevertheless... managed to catch the train.
2009-02-16 15:23:10 補充：
若按文法進一步推敲 However 表示相反語氣較弱 still 和 yet, nevertheless 相似用來說明一強烈相反的結論不過still和yet語氣較強烈例如:
It is true that winter is over;still, it is almost as cold
2009-02-16 15:24:03 補充：
He will never succeed, however hard he tries.