ad.

1. 坏；拙劣地
   She sings badly.

   她唱得不好。

2. 邪恶地；罪恶地
   To steal is to act badly.

   偷窃是恶劣行为。

3. 不利地；有害地
   He spoke badly of his boss.

   他说他老板的坏话。

4. 不正确地
5. 严重地；厉害地
   My back hurts badly.

   我的背疼得厉害。

6. 【口】很，非常
   She wants to go badly.

   她很想去。

adv.

1. in a bad manner.
2. severely; seriously.
3. very much.