Necessity, have to, need to, must, Recommendations, advice, opinions, should, ought to, Prohibition, mustn't, can't, Absence of Necessity, don't have to, don't need to, Possibility, could, may, might, would, Permission / ability / possibility, can

Modals

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？