A) can B) could C) may
A) might B) can C) must
A) might B) can't C) must
A) must'nt B) could C) should
A) shall B) must'nt C) ought to
A) might B) must C) can't
A) may B) might C) should
A) may B) can C) can't
A) must B) can C) may
A) can't B) mustn't C) might |