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