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If someone calls me, and I say I can't talk to them at the moment, because I'm at school, is there any difference between the following two sentences?

  • I'm at school.
  • I'm in school.

Do they convey the same meaning or they are different?

marked as duplicate by RegDwigнt Apr 2 '14 at 13:04

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"I'm in school" means that you are actually attending school; that is, you are at school during school hours and doing an activity related to school. "I'm at school" means that you're at the place where you attend school, but you may or may not be attending school. For your sentence, if somebody says

I can't talk because I'm in/at school,

presumably they are busy because they are attending school, so in this context they have the same meaning. For a different context, they are different. For example:

I missed the bus; I'm still at school. Could you come pick me up?

You wouldn't use in school in that sentence.

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