a.m. / A.M. 用法说明
1. 意义相当于 before midday, in the morning, 所以不能与 in the morning 连用。如:
正:at 7 a. m. 在上午七点
正:at 7 in the morning 在上午七点
误:at 7 a. m. in the morning
2. 不单独使用,要与表示时间的数字连用 。如:
Openfrom 8 a. m. to 6 p. m. 从上午8点到下午6点
Ill comeat 10:20 a. m. 我将明天上午10点20分来。
3. 不能与 oclock 连用。如:
正:at 9 a. m. 在上午九点
误:at 9 oclock a. m.
4. 不仅可作状语,而且可作定语。如:
the 8 a. m. train from London从伦敦开来的上午8点的列车
注:P. M. / p. m. 的具体用法同此。
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