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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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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