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问答 | 如何使用 am 和 pm 表达时间?

李晨老师教英文  · 公众号  · 英语  · 2022-07-21 07:00

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Ask a Teacher
是一档 高质量的
英语用法问答节目
亦可用于听力练习

录音语速较慢
可使用“倍速”按钮
提至1.25~1.5倍即为常速

Hello! This week on Ask a Teacher , we will answer a question from Max in China about the difference between a.m. and p.m.

Question:

This is Max from China. During a listening exam I heard a saying like this, “The incident happened on the 400 block of Rutland Road just after 12:30 PM,” and it was described as midnight. I’m confused . I think that 12:30 PM should be at noon during the day, and if I want to say the time of midnight I think AM is correct. Which one is right? Thank you for helping me solve this problem.

Best regards,

Max

Answer:

Dear Max,

Thank you for writing to us.

You are correct! In the United States, we do not use a 24-hour clock in day-to-day speech. But some special fields that demand very clear communication use a 24-hour clock. So, you might hear a person describe such time as “military time.” A 24-hour clock is more commonly used internationally than it is in America.

We use a 12-hour clock and abbreviations from Latin to tell time, a.m. ( ante meridiem , meaning before midday) and p.m. ( post meridiem , meaning after midday).

Our morning clock starts at 12:00 a.m. That is 0:00 (zero hundred hours), or midnight, internationally.

Morning, or a.m. hours, go until 12:00 p.m., which would also be 12:00 on an international, 24-hour clock.

But most of the time, we do not show a difference between the two forms of timekeeping in everyday speech. For example, we know that, if a friend wants to meet at 2:00 local time, hopefully they do not want to meet at 2:00 in the morning.

Let us look at a few examples to compare times.

My supervisor planned the meeting for 3 p.m.

This means that the meeting will take place at 3:00 in the afternoon.

That new superhero movie is so long; it lasted until 1 a.m.







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