如果但說不好，可以用 Bad

或者 It is not good 這是不好的

在句子裡翻譯可以有好多了，不一定就是"不好"的固定片語，如

.我做不好，請幫幫我。

I can"t do it well. Please help me.

.我必須說都怪我不好。

I must say that I am very much to blame.

地太板了，不好鋤。

The ground is too hard to hoe.

昨天夜裡我睡得很不好。

I slept very badly last night.

儘管他幹了違法的事情，但很少有人認為他不好。

Despite his illegal act, few people think badly of him.

要是讓我為別人工作，我一定做不好。

I"d be hopeless at working for somebody else

我想參軍，但因身體不好而碰了一鼻子灰。

I tried to join the army but was rejected because of poor health.

我數學向來就不好。

I was never any good at maths.