形容词坏的，不好的; 严重的; 不舒服的; 低劣的，有害的

名词坏人，坏事

副词不好地，非常地

形容词

1. They arrived at a bad time.
他们来得不是时候。

2. The weather was really bad.
天气真糟。

3. She's got a bad headache.
她头痛得厉害。

4. That's not a bad idea.
那个主意倒不错。

肯定表达

A：My advice would be to finish it at once.
我的建议是立刻做完。

B：That’s not a bad idea.
这个主意不错。

搬家

A：I could never (get used to/ grow accustomed to) it, though.
可是我（无法习惯/不能习惯）。

B：It’s not too bad
还不是很糟糕。

订货

B：Here are the quotations that you asked for .
这是你的报的价。

A：How do they compare to last year‘s ?
与去年的相比怎么样。

B：The price increases haven‘t been too bad at all .
没有涨太多。

A：That‘s good to hear .let‘s take a look at your prices .
那好，我们来看看你的报价吧。

1. bad：betaine aldehyde dehydrogenase; 甜菜碱醛脱氢酶

2. bad：business application division; 商业应用软件部

1. 坏的；令人不快的；不合意的；有害的；糟糕的
Something that is bad is unpleasant, harmful, or undesirable.

e.g. The bad weather conditions prevented the plane from landing...
糟糕的天气使飞机无法降落。
e.g. We have been going through a bad time...
我们正经历一段困难时期。

2. 严重的；厉害的；剧烈的
You use bad to indicate that something unpleasant or undesirable is severe or great in degree.

e.g. He had a bad accident two years ago and had to give up farming...
他两年前遇到严重的车祸，不得不放弃务农。
e.g. This was a bad case of dangerous driving...
这是一起严重的危险驾驶案例。

3. 不明智的；错误的；不对的
A bad idea, decision, or method is not sensible or not correct.

e.g. Economist Jeffrey Faux says a tax cut is a bad idea...
经济学家杰弗里·福克斯认为减税是不明智的。
e.g. Of course politicians will sometimes make bad decisions...
政治家当然有时也会作出错误的决定。

4. 不利的；不幸的
If you describe a piece of news, an action, or a sign as bad, you mean that it is unlikely to result in benefit or success.

e.g. The closure of the project is bad news for her staff...
项目终止对她的雇员来说是一个不幸的消息。
e.g. It was a bad start in my relationship with Warr...
我与沃尔的关系开始得不太顺利。

5. 不合标准的；劣质的；蹩脚的；不足的
Something that is bad is of an unacceptably low standard, quality, or amount.

e.g. She was in rather a bad film about the Mau Mau...
她出演了一部关于茅茅运动（20世纪50年代肯尼亚基库尤人反抗英国殖民者的民族主义运动）的烂片。
e.g. Many old people in Britain are living in bad housing...
英国有很多老人居住条件恶劣。

6. 不擅长的；不善于的
Someone who is bad at doing something is not skilful or successful at it.

e.g. He had increased Britain's reputation for being bad at languages...
他加深了人们对英国人不擅长语言的印象。
e.g. He was a bad driver...
他是一个技术糟糕的司机。

7. 难以接受的；令人遗憾的
If you say that it is bad that something happens, you mean it is unacceptable, unfortunate, or wrong.

e.g. Not being able to hear doesn't seem as bad as not being able to see...
看不见比听不到更让人难以忍受。
e.g. You need at least ten pounds if you go to the cinema nowadays — it's really bad.
现在看场电影至少要花上10英镑——真是太贵了。

8. （尤表示惊讶）不错的，不坏的，挺好的
You can say that something is not bad to mean that it is quite good or acceptable, especially when you are rather surprised about this.

e.g. 'How much is he paying you?' — 'Oh, five thousand.' —'Not bad.'...
“他给你多少钱？”——“哦，5,000。”——“挺不错嘛。”
e.g. 'How are you, mate?' — 'Not bad, mate, how's yourself?'...
“最近怎么样，老兄？”——“还不错，你呢？”

9. 邪恶的；不道德的
A bad person has morally unacceptable attitudes and behaviour.

e.g. I was selling drugs, but I didn't think I was a bad person...
我贩卖毒品，但我并不觉得自己是个坏人。
e.g. He does not think that his beliefs make him any worse than any other man.
他觉得自己的信仰并不让他比其他人更邪恶。