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In British English, “am” or “pm” cannot be used with “o’clock.”

Is it acceptable to use o'clock with am or pm in American English?
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Hi,

Is it acceptable to use o'clock with am or pm in American English? No, it's not.

Clive
What?
In American English is alwayse used: three am or six pm. How this cannot be possible?
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Hi,

What I meant was that you shouldn't say both together, eg 'It's 10 o'clock pm.'

Clive
Hi Clive, have a look at: "... In 12 hour time there would not be a 15:00, it would be stated as three o’clock in the afternoon or three o’clock p.m. ..." www.militarytimeclockchart.com rgds, Andreas
TeoIn British English, “am” or “pm” cannot be used with “o’clock.”
Really? I'm American. I didn't know that. The following seems all right to me.

— It happened at 11 o'clock.
— AM or PM?
— PM. 11 o'clock PM.

CJ
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I live in Canada.
Broadly speaking, no-one says three o'clock p.m.
I'm with Clive. It's surely not forbidden by grammar but unless you have a clarifying question as in CJ's example, you're MUCh more likely to hear 3 pm or 3 o'clock in the afternoon, rather than 3 o'clock pm.

You normally use o'clock in pm times.
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