定义 / 说明
too 表示“超过需要/超过可接受程度”，enough 表示“足够”。这两个词很常见，但句中位置有明确规则。too 往往暗示问题，enough 往往表示需求被满足。B1 阶段要同时掌握意义和位置，才能准确表达日常情境。
关键规则
- too + adjective/adverb：too cold, too slowly。
- adjective/adverb + enough：warm enough, quickly enough。
- enough + noun：enough time, enough money。
- 常见 enough + to-infinitive：old enough to vote。
- too 常表示问题；enough 常表示足够。
例句
- It's too cold to swim. - 天太冷，不能游泳。
- He's old enough to vote. - 他已经够年龄可以投票了。
- We don't have enough time. - 我们没有足够时间。
- She did not speak loudly enough. - 她说得不够大声。
- The bag was too heavy to carry. - 这个包太重，拿不动。
常见错误
- ❌ It's enough cold outside. -> ✅ It's too cold outside.
- ❌ He is enough old to drive. -> ✅ He is old enough to drive.
- ❌ We have time enough for lunch. -> ✅ We have enough time for lunch.