It opens at 8 am on weekdays,but at 9 at weekends.为什么这句话中,工作日和周末前面的介词不同呢

It opens at 8 am on weekdays,but at 9 at weekends.为什么这句话中,工作日和周末前面的介词不同呢 shop (opens) at 8:00 am and it (is opened) for ten hours every day.The shop____ at 8:00 am and it ___ for ten hours every day.A.opens; is openedB.is opened;openswhy?A.opens; is open The shop （）at 8:00 am,and it ( ) for ten hours every day 分别填opens 还是 is open注意 是两个空。前一个空为什么填opens 后一个为什么填 is open？ The supermarket opens at 8:00am and closes at 8:00pm.(改为同义句) The shop opens at 8:00 am and closea at 9:00 pm的同义句 the shop opens at 8:00am and closes at 6:00 pm.改为同义句 It opens in the school at seven o'clock on Sunday 翻译 shop (opens) at 8:00 am and it (is opened) for ten hours every day括号里的为什么要这么填? the shop opens at 9;00 am 为什么用opens而不用open? the shop (is open)from 9.am.to 5 pm.it means the shop (opens) at 9 am.为什么填括号内的内容? The shop (opens) at 8:00 am and it (is open) for ten hours every day后面一空为什么不用被动语态?每天被开放十个小时啊 The bookshop____(opens/is open).It usually____(opens/open/is open)at eight in the morning The shop opens ________ 9:00 am and 10:00 pm ________ Saturday and Sunday.A.from … to B.between … on C.at … in The park opens at 5 am all the year round,but the closing time ______,depending on the season.用changes还是has changed 英译中:It announced that it plans to release its 2007 results before the market opens on 8 the shop opens at 8:00am and close at 8:00pm 同义句the shop has ()()()12 hours a day. It opens from 8a.m to 10p.m是opens还是is open It opens between 9am and 8 pm 这句话哪里错了It opens between 9am and 8 pm 、It closes between 9am and 8 pm 这两个都不对吗 错哪了 为什么不能这样说?