ClumsyMonkey.net

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Yup. If you're writing a sentence and encounter it's/its, then insert "it is" and see if the phrase still makes sense. If "it is" works, then use it's. Like, you wouldn't say "the plant shed it is leaves", so use its in that case.

My english teacher said these were some of the best ones he had ever seen.

...my english teacher is ignored most of the time....
damn hooligans