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时间状语前 什么时候要加介词 什么时候不加呀 I went to school yesterday.I was at h

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时间状语前 什么时候要加介词 什么时候不加呀 I went to school yesterday.I was at home on Monday
楼主,有些前面不用加介词如yesterday(昨天),tomorrow(明天),the other day(不久前的有一天),the day before yestoday(前天),the day after tomorrow(后天),the first/second/next等序数词 day/year/month/time/moment等(第一/二等天/年/月/次/时刻等),all of a sudden(突然),this/that year/day/month/moment/time(这/那一年/天/月/时刻/次)
时间副词也可以做时间状语,如suddenly(突然地),yearly(每年地),daily(每天地),monthly(每月地)等
其中suddenly比较特殊,可以做连词,连接两个句子
例子:I shuold have had a booth suddenly I came back home.(我本应该一回到家就洗澡的)
其他的时间名词一般要加介词才可做状语,如on a clear day,in the new year,in summer/spring/fall/autumn/winter,at the (very,just) moment等2 表时刻用at (10 o'clock)表日子用on( May 4th,Saturday)表月份用in (May)表年份用in