但是的用法和样例：
例句
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他们探索过各种途径，但是没有找到解决的办法。
They exploded every avenue but could not find a solution.
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那把椅子原本是为你准备的，但是被她拿走了。
The chair was intended for you, but she took it away.
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我喜欢他的写作风格，但是不喜欢他的内容。
I like the style of his writing but I don't like the content.
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向导离他们而去，但是他们毫不气馁，仍向森林进发。
Their guide deserted them, but, nothing daunted, they pressed on into the jungle.
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他很有天赋，但是他已经丧失了信心。
He has great talent, but he has lost his faith.
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商业信函必须是正式的，但是写信给朋友应写得自然一些。
Business letters must always be formal, but we should write in a natural way to friends.
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我想把机器修理好，但是失败了。
I tried to fix the equipment but I failed.
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我打过电话了，但是没有人接。
I've called but nobody answered.
短语
以上内容独家创作，受著作权保护，侵权必究
