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marked as duplicate by waiwai933 Jan 25 '13 at 9:03

This question was marked as an exact duplicate of an existing question.

I suspect the answer is "Because your teacher says that's the style she wants". – Andrew Leach Jan 25 '13 at 8:55
I strongly suggest you visit our English Language Learners site and benefit from it. area51.stackexchange.com/proposals/41665/… – Kris Jan 25 '13 at 9:09
Wait. It is important for you to clarify what you mean by text. Please edit your question to explain. – Kris Jan 25 '13 at 9:11

It depends on how formal you want to be. The contracted form I’m will be suitable for many contexts, and certainly in most forms of electronic communication. It would not, however, be appropriate in an academic paper, for example.

share|improve this answer
One of these days, however, we'll be able to use contractions in formal academic papers. I look forward to that. Maybe not for another 20 years, though. – user21497 Jan 25 '13 at 9:23
@Bill Franke. Indeed, and it may already be happening with contrations such as don't. – Barrie England Jan 25 '13 at 9:28

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