时态填空It's six o'clock in the afternoon now.Betty ( )(dance) i
时态填空
It's six o'clock in the afternoon now.Betty ( )(dance) in her own room while her mother ( )(vacuum) the rug in the living-room.
It's six o'clock in the afternoon now.Betty ( )(dance) in her own room while her mother ( )(vacuum) the rug in the living-room.
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It's six o'clock in the afternoon now.Betty (danced) in her own room while her mother (was vacuuming) the rug in the living-room.
主句（一般过去时）+while+从句（过去进行时）
while还引导主从句的动作同时发生
希望我的回答对你有帮助！
主句（一般过去时）+while+从句（过去进行时）
while还引导主从句的动作同时发生
希望我的回答对你有帮助！
1年前
1
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