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