All the students were sweeping the floor____they heard a man ____ “help”.A.while;shouting B.while;to shout c.when;to shout D.while;shouts 选出答案的理由要写出来.

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Allthestudentsweresweepingthefloor____theyheardaman____“help”.A.while;shoutingB.while;toshoutc.when;

All the students were sweeping the floor____they heard a man ____ “help”.A.while;shouting B.while;to shout c.when;to shout D.while;shouts 选出答案的理由要写出来.
All the students were sweeping the floor____they heard a man ____ “help”.
A.while;shouting B.while;to shout c.when;to shout D.while;shouts 选出答案的理由要写出来.

All the students were sweeping the floor____they heard a man ____ “help”.A.while;shouting B.while;to shout c.when;to shout D.while;shouts 选出答案的理由要写出来.
A while 表示“同时”
shouting 是进行时,因为听见的时候是正在喊
请及时采纳,多谢!

A while表示两个事件同时发生。
hear sb shouting help 听到某人在大喊救命
前后动作同时进行sweeping the floor跟shouting help

A。while引导状语从句，hear sb doing sth 表示当时那人正在呼叫

选择A吧。我是这样理解的，while 表示当什么的时候，后面用shouting表示主动状态，相对于man来说是他主动发出的动作所以ing形式

选A
while 表示同时发生，一般和进行时连用。
hear sb. doing sth. 表示听到某人正在做某事。

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