I should❶ like to call on you at a time that is convenient.
I would❷ be grateful if you could❸ find a moment when we might❹ be alone.
两句话来自年代剧里书信里的话。我作了四处标记❶~❹。除了❷是助动词用于虚拟语气,不带有情态意思,其余三处都是带有情态意思,是吧
→更明确地讲,我就是想确认
助动词不带有情态意思,情态动词带有情态意思。是吧