定义 / 说明
高级表达中，概率与立场常通过“整套表达”而不只单个情态动词呈现。英语常用 be bound to, be likely to, be unlikely to, apparently, presumably, seem to 等来体现把握度。这些结构帮助表达 stance（信心、谨慎、与命题距离）。在讨论、分析、正式论证中很常见。不同表达会把语气从笃定调到谨慎。
关键规则
- 用 be likely to / be unlikely to 表示有理据概率。
- 用 be bound to 表示强预期（常基于经验/逻辑）。
- 用 apparently/presumably/evidently 等副词标注信息来源或强度。
- 用 seem to / appear to 表示观察性、谨慎性。
- 这些模式常比单纯 may/might 更精细地表达立场。
例句
- She's bound to notice. - 她肯定会注意到。
- It's likely to take hours. - 这很可能要花好几个小时。
- He appears to know more than he says. - 他看起来知道得比他说出来的多。
- Apparently, the meeting was cancelled. - 据说/看来会议取消了。
- They are unlikely to accept the offer. - 他们不太可能接受这个报价。
常见错误
- ❌ She is bound noticing. -> ✅ She is bound to notice.
- ❌ It is likely that takes hours. -> ✅ It is likely to take hours.
- ❌ Apparently he is seems tired. -> ✅ Apparently he seems tired.