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