情态动词
Do Modals in English Have Tense Forms? 英语情态助动词有无时态形式?
The fact, state, or quality of being modal. 形式作为一种形式的事实，状态或性质
Are the melodies modal, tonal, or post-tonal? 他们是中古教会调式，音调得，后音乐调式?
Can be used in conjunction with modal verbs. 还可以搭配一些表示心理活动的动词。
Continues a window's modal status. 继续一个窗口的模式状态。
Are the harmonies modal or tonal? 这些和弦是调式的还是音调的?
