“would rather than”本身不直接触发虚拟语气，其虚拟含义体现在“would rather”后接从句时，从句需用虚拟语气，表示“宁愿某人做某事（与事实相反或不太可能发生）”。
核心用法：“would rather + 从句”的虚拟规则
1. 表示与现在/将来事实相反：从句谓语动词用过去式（be动词统一用were）。
例句：I would rather you stayed here with me now.（我宁愿你现在留下来陪我。→ 实际对方可能要走）
例句：She would rather he were not late tomorrow.（她宁愿他明天不迟到。→ 实际担心他会迟到）
2. 表示与过去事实相反：从句谓语动词用had + 过去分词。
例句：I would rather you hadn't told her the truth.（我宁愿你没告诉她真相。→ 实际已经告诉了）
“would rather do A than do B”结构
该结构表示“宁愿做A而不愿做B”，连接两个并列的动词原形，不涉及虚拟语气，陈述当下的选择偏好。
例句：He would rather walk than take a bus.（他宁愿走路也不愿坐公交。）
