在英语中,“while + doing” 是一种常见的省略结构,用于表示两个同时发生的动作。
它实际上是 “while + 主语 + be + doing” 的简化形式,当主句和从句的主语一致且从句动词为 be 动词时,可以省略主语和 be 动词。
完整句: While I was walking to school, I saw a cat. 简化句: While walking to school, I saw a cat.
使用条件
主句和从句的主语必须相同。
从句中的动词必须是进行时态(be + doing)。
通常用于描述背景动作或伴随状态。
❗ 如果主语不同,则不能使用这种省略结构。
错误示例:While walking to school, the cat ran across the street.(主语不一致)
常见例句
• While cooking dinner, she listened to music.
• He hurt his knee while playing basketball.
• While waiting for the bus, I read a book.
• They had a great time while traveling in Japan.