but的音标：英式读音为[bət , bʌt]，美式读音为[bət , bʌt]。but可作连词、介词、副词和名词，基本含义为“但是”、“相反”、“尽管如此”、“除…外”、“仅仅”、“借口”、“推辞”。

but作为四种词性，可作连词、介词、副词和名词，译为但是;而;然而;相反;尽管如此;表示歉意时说;除…外;除了;只有;仅仅；借口;推辞。例句有：

1、I got it wrong. It wasn't the red one but the blue one.

我弄错了。不是红的那个，是蓝的那个。

2、I'd asked everybody but only two people came.

每个人我都请了，却只来了两个人。

3、I'm sorry but I can't stay any longer.

很抱歉，我不能再待下去了。

4、But that's not possible!

但那是不可能的！

5、I had no choice but to sign the contract.

我别无选择，只好签了合同。

6、Nothing, but nothing would make him change his mind.

没有什么，绝对没有什么会使他改变主意。

7、We've had nothing but trouble with this car.

我们这辆车净出毛病。

8、Who but Rosa could think of something like that?

除了罗莎，谁会想得到那种事？

9、I don't think we'll manage it. Still, we can but try.

我想我们应付不了这事。但不妨试试。

10、With so many ifs and buts , it is easier to wait and see.

有这么多托词，还是静观其变吧。

11、Please excuse me, but there is something I must say...

不好意思，但有些话我必须说。

12、Europe will be represented in all but two of the seven races...

除了两项赛事之外，欧洲在其余5项赛事中都有代表参加。