badadj.坏的；不好的；差的；疼痛的；严重的；有害的；腐败的；低劣的；不利的；不舒服的；不健康的n.坏人；坏事adv.非常；不好地Baduel巴杜埃尔

1. Bad companions tempted him into wrong doings.
   他交的坏友引诱他去做坏事。
2. We can see that friction is not always bad things.
   我们可以看到摩擦并非总是坏事情。
3. He won't stand for any funny business here.
   他不准有任何不道德的事在这里发生。
4. We'd thought he was a gentleman, but he turned out to be a very bad hat indeed.
   我们原以为他是一位绅士，结果他却是一个很不道德的家伙。