"be exempt" or "be exempted"
There are two parts of speech in this word according to dictionaries.
It seems to make sense that when use it as an adjective, "someone should/can be exempt from ..."; while use it as a verb, "someone should/can be exempted from ...". However, the English language is much older than those smart grammar scholars and, as a foreigner, how can I know which form I should use when I just want to say that "naive" idea of "be exempted"?
Thanks!