We clean the classroom ( )Friday afternoon.

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/18 01:15:38

We clean the classroom ( )Friday afternoon.
A.on B.in C.at D./

A on

in后面所接的都是较长时间.具体用法有：
1．表示在较长的时间里（如周／月份／季节／年份／世纪等）.如：in a week； in May； in spring／summer／autumn／winter； in 2008； in the 1990’s等.
2．表示在上午、下午或晚上.如：in the morning／afternoon／evening.
3． in the daytime（在白天）属于固定搭配,指从日出到日落这一段时间,反义词组是in the night.
4． “in ＋一段时间”表示“多久以后／以内”,常与将来时连用.如：in half an hour； in ten minutes； in a few days等.

on所接的时间多与日期有关.具体用法有：
1．表示在具体的某一天（如日期、生日、节日或星期几）.如：on May 4th, 1919； on Monday； on Teachers’ Day； on my birthday； on that day等.
2．表示某一天的上午、下午或晚上.如：on the morning of July 2； on Sunday afternoon； on a cold winter evening等.

at指时间表示：（1）时间的一点、时刻等.如：
They came home at sunrise （at noon, at midnight, at ten o’clock, at daybreak, at dawn）
（2）较短暂的一段时间.可指某个节日或被认为是一年中标志大事的日子.如：
He went home at Christmas （at New Year, at the Spring Festival, at night）.

We clean the classroom ( )Friday afternoon. We clean the classroom on Friday afternoon.改为一般疑问句 we clean the classroom every Friday afternoon.的句子成分 we clean the classroom every friday afternoon翻译 We __(clean)the classroom this afternoon. We cleaned our classroom ___ Friday afternoon. ---any school boys in the classroom last friday afternoon?A We clean our classroom in the afternoon(改为现在进行时） We（）（）our c We must ___(keep) the classroom clean. ---________ we clean the classroom at once? shall we clean the classroom now who ( )to clean the classroom() afternoon?A,would like ;this