while从句中省略主语和be的用法

while 从句中省略主语和be 的用法

[原句展示] [用法归纳]

while 引导状语从句作“当„„时候”讲时，如果主句和从句的主语一致, 且从句谓语又含有be ，则从句中有时可省略主语和be, while 后可以直接跟现在分词、过去分词、名词、形容词或介词短语。如：

While (she was) listening to the radio, she fell asleep.

While (you are) asked to answer questions, please speak louder.

While (he was) yet a youth, he gained many prizes.

While (he was) ill, he went on working.

He caught a cold while (he was) on vacation.

[即学即练]

把下列句子翻译成英语，省去能省略的成分。

1. 我在上大学时就认识他。

2. 他在打篮球时受了伤。

Key:

1. I knew him while at college.

2. He hurt himself while playing basketball.