态助动词有十三个：may, might; can, could; will, would; shall, should; must, need, dare, used to, ought to. 无过去时形式的情态助动词有must need used to ought to 希望着对你有帮...
无过去时形式的情态助动词------哪些?
0
0
态助动词有十三个：may, might; can, could; will, would; shall, should; must, need, dare, used to, ought to. 无过去时形式的情态助动词有must need used to ought to 希望着对你有帮...