wrote:
> HI quel différence sa fait ?
>
> Thank you
In my opinion I'm is spoken English, whereas I am is
written English.
Arthur
> HI quel différence sa fait ?
"I'm" cannot be used at the end of a sentence in speech or in writing:
A: I'm not hungry, but he is.
B: He's not hungry but I am.
C: Who's going to New York tomorrow?
D: I am. [NOT: *"I'm."]
Otherwise, "I'm", being a contraction, is less formal than "I am".
And it can't be used to emphasize the verb:
E: Yes, I AM hungry.
versus
F: Yes, I'm hungry.

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Franke: EFL teacher & medical editor
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