问题描述:
we clean the classroom every Friday afternoon.的句子成分
为什么不能说we clean the classroom in every Friday afternoon
或we clean the classroom on every Friday afternoon
或we clean the classroom at every Friday afternoon
为什么?
时间状语前都不加介词吗?
请举例详细说明
为什么不能说we clean the classroom in every Friday afternoon
或we clean the classroom on every Friday afternoon
或we clean the classroom at every Friday afternoon
为什么?
时间状语前都不加介词吗?
请举例详细说明
问题解答:
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