英语副词何时加lly

当原来的形容词是l结尾时，变成副词就是lly形式了。如: legally， finally

The police legally arrested those involved in the illegal drug trade.

警方依法抓捕了进行非法毒品交易的人。

It's not finally settled yet.    这还没有彻底解决。

They finally realized that the whole thing was a joke. 他们终于意识到整个事情是场玩笑。