bad 含义广泛，指任何不好的或不合需要的品质。
evil 语气比bad强，强调道德上的邪恶不良，含狡猾凶险或危害他人的意味。
ill 与evil意义接近，但语气弱一些，常指道德或性质方面的不良。
poor 普通用词，侧重指事物的质量或数量低于标准或不合要求。用于指天气与食品时可与bad通用。
wicked 语气比evil强，指居心叵测，任意违反道德标准，有意作恶。
参考例句
1. But there will be bad weather in spring and autumn. 但是这里的春天和秋天将会有坏的天气。
2. Although TV has some benefits, sometimes it has bad influence. 虽然电视有一些好处，有时它也有坏影响。
3. She says any food with white sugar or white flour is bad for health. 她说任何含有白糖和白色面粉的食物对健康都是有害的。
英英解释
n.
1. that which is below standard or expectations as of ethics or decency
2. having undesirable or negative qualities
3. very intense
4. feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad')
5. (of foodstuffs) not in an edible or usable condition
6. feeling or expressing regret or sorrow or a sense of loss over something done or undone
7. not capable of being collected
8. below average in quality or performance
9. nonstandard
10. not financially safe or secure
11. physically unsound or diseased
12. capable of harming
13. characterized by wickedness or immorality
14. reproduced fraudulently
15. not working properly adv.
1. with great intensity (`bad' is a nonstandard variant for `badly')
2. very much; strongly
