used to show a difference or contrast
I wanted to go, but I was too busy.
行きたかったけど、忙しすぎた。
however; even so
It was cold outside, but we still had fun.
外は寒かったけど、それでも楽しかった。
used to say sorry before giving bad news
I'm sorry, but I can't help you today.
申し訳ありませんが、今日はお手伝いできません。
used to show surprise or disagreement
But that can't be right!
でも、それはありえない!
except
I had no choice but to wait.
待つしか選択肢がなかった。
used to emphasize by repeating
Nothing, but nothing will change my mind.
何も、本当に何も私の考えを変えられない。
used to show something is always true
She never sees that place but she remembers happy times.
彼女はその場所を見るたびに幸せな時間を思い出す。
except for
Everyone came but John.
ジョン以外は全員来た。
only
We can but try our best.
私たちにできるのは最善を尽くすことだけだ。
an excuse for not doing something
He always has a but when asked to help.
彼は助けを求められると必ず言い訳をする。