定义 / 说明
我们用 as ... as 表示两者在某方面“同样……”。用 not as ... as 表示“不如……”。形容词放在中间：as tall as, as easy as, not as fast as。它不同于比较级（如 bigger、more expensive）。该结构适用于强调“相等”或“同一性质上的差异”。
关键规则
- 结构：as + adjective + as。
- 否定结构：not as + adjective + as。
- 该结构中不要使用比较级形式如 bigger。
- 可用于比较人、物、地点和情境。
- 日常口语中，as 后常接宾格代词：as tall as me, as fast as him。
例句
- She is as tall as me. - 她和我一样高。
- This bag is not as expensive as that one. - 这个包没有那个贵。
- My room is as quiet as yours. - 我的房间和你的一样安静。
- He is not as busy as last week. - 他没有上周那么忙。
- Today is as cold as yesterday. - 今天和昨天一样冷。
常见错误
- ❌ She is as taller as me. -> ✅ She is as tall as me.
- ❌ This bag is not as expensive than that one. -> ✅ This bag is not as expensive as that one.
- ❌ My room is as quiet than yours. -> ✅ My room is as quiet as yours.