请问一般现在时第三人称单数动词什么时候不加s答:1.情态动词,不能加,比如must,can,may,might,will,would,shall,should 注意:need, dare+动词原形,不能加S, 比如 He need study hard. He dare walk in the dark.need,dare+to do, 要加+S. He needs to study hard. He dares to walk in the dark.
英语情态动词答:情态动词 (Model Verbs) 又称为情态助动词 (Model Auxil-iaries), 主要有can, may, must, could, might, shall , should, will, would, ought to, need, dare等。情态动词与其他动词连用表示说话人的语气。情态动词可表达建议、要求、可能和意愿等。情态动词没有人称和数的变化。情态动词部分重点...