情态动词Have to .can.must答:情态动词有:can,could,may,might,ought to,have to,need,shall,should,will,would,dare 情态动词有can (could),may (might),must,have to,shall (should,will (would),dare (dared),need (needed),ought to等。情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语 一、can,...