Contractions are a handy feature in English grammar, allowing us to combine a couple of words into one. Contractions such as we’re and they’re are fine, but I just received an email using the would-be contraction that’re, which is completely bogus and not acceptable in standard English.
Another such unacceptable contraction would be there’re.
Though I know by ear and experience that that’re and there’re are both incorrect English, finding a rule to explain why isn’t so easy to do. I did a Google search on “rules for contractions in English” and found all kinds of sites showing examples of how to correctly use contractions, but not a single site that could cite a rule concerning when contractions shouldn’t be used.
If anyone finds the rules, please let me know.
Meanwhile, remember this: Contractions should never be used in formal writing, whether a college essay or a business proposal. In fact, contractions should generally be confined to oral communication.