2016年6月英语四级第1套真题句子解析： A person who had input into where he would move and has had time to adapt to it might do as well in a nursing home as in a small residential care home, other factors being equal.

A person who had input into where he would move and has had time to adapt to it might do as well in a nursing home as in a small residential care home

主句是"A person might do as well..."，第一层嵌套是定语从句"who had input into where he would move and has had time to adapt to it"修饰"person"，第二层嵌套是宾语从句"where he would move"嵌入在定语从句中作"into"的宾语。形成了"主句 → 定语从句 → 宾语从句"的两层嵌套结构。

other factors being equal

"other factors"是逻辑主语（名词短语），"being equal"是现在分词短语，二者构成独立主格结构。这个结构在语法上独立于主句（主句主语是"a person"），表达"在其他因素相同的条件下"这一附加条件，典型的条件类独立主格。

adapt to

"adapt to" 是典型的动词+介词固定搭配，表示"适应"。其中 "to" 是由动词 "adapt" 决定的固定介词，不可替换为其他介词（不能说 adapt with 或 adapt for）。

这类搭配的核心特征是：动词的语义必须通过特定介词才能完整表达。"adapt" 单独使用时是及物动词"改编/调整"，但表示"适应"义时必须用 "adapt to"，to 后接适应的对象。

识别方法：看到这些动词时，先判断其后介词是否为固定搭配所要求的介词。本句中 "had time to adapt to it" 里，"to adapt" 是不定式，其后的 "to it" 中的 "to" 才是与 "adapt" 构成固定搭配的介词，"it" 是介词宾语指代前文的搬迁情况。

常见陷阱：不要把不定式符号 "to" 与固定搭配中的介词 "to" 混淆。本句恰好两个 "to" 相邻（"to adapt to"），第一个是不定式标记，第二个才是固定搭配的介词。

迁移规律：此类固定搭配的介词选择具有任意性（无法从逻辑推导），必须记忆。但同一介词往往聚集相似语义的动词："to" 类多表"朝向/适应"（adapt to, adjust to, conform to），"on" 类多表"依赖/聚焦"（rely on, focus on），"from" 类多表"来源/摆脱"（derive from, recover from）。