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