sb be made to do 用法详解
在英语语法中，“sb be made to do” 是一个常见的被动语态结构，用于表达“某人被迫做某事”。它源自主动语态中的使役动词 “make + 宾语 + 动词原形（do）”，但在变为被动语态时，需补上 “to”。
一、基本结构
- 主动语态： Subject + make + object + do something
例：The teacher made the students clean the classroom.
- 被动语态： Object + be made + to do something
例：The students were made to clean the classroom.
二、核心规则
- 使役动词 “make” 在主动语态中后接不带 “to” 的不定式（bare infinitive）。
- 当句子变为被动语态时，必须加上 “to”，即 “be made to do”。
- 该结构强调动作是被强制或被迫完成的，常带有负面或中性语气。
三、典型例句
- He was made to apologize for his mistake.
- She was made to work overtime without pay.
- We were made to wait outside for an hour.
四、常见误区
❌ 错误：They were made clean the room.
✅ 正确：They were made to clean the room.
许多学习者会忘记在被动语态中加 “to”，这是高频错误点。
五、扩展说明
类似结构还有：
- sb be let to do（×）→ “let” 一般不用于被动语态。
- sb be heard/seen to do（√）→ 感官动词在被动语态中也需加 “to”。