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