Why can't I use the contractions "they're" or "we're" at the end of a sentence?
contractions - Does "he's" mean both "he is" and "he has"? - English Language & Usage Stack Exchange
How come there's "there's" (the contraction of "there is") but there's no "there're (which would serve as the contraction of "there are")? The same case with "where's" and "where're".
What's the big deal with contractions? Why are they considered to be bad English?
You mean won't.
They're not bad English, they're informal English. It's okay to use them in regular conversation, like on Reddit, but not in certain formal settings, such as middle-school history papers.
More on reddit.comWhen should I use contraction words?
What are contraction words in English?
What are some common mistakes with contraction words?
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For example, "I've never met my parents; I have no idea who they're."
or
Is anyone else hungry? Because we're.
Obviously, those are both terrible sentences, but if they're=they are and we're=we are, shouldn't it work?
Yes and no.
You do use "he's" for "he is" and "he has".
You do use "he's got something" for "he has got something."
You do not use "he's something" for "he has something." [Note that according to @Optimal Cynic this is allowed in some parts of the world]
Therefore the first two sentences you proposed are correct:
He's angry.
He's been angry.
But the third one is incorrect. You cannot shorten "he has a house" to "he's a house." You can only shorten "he has got a house" to "he's got a house." [Again, note what @Optimal Cynic claims]
More examples:
Correct: I have an apple.
Correct: I have got an apple.
Correct: I've got an apple.
Incorrect: I've an apple.
Yes. He's can mean either he is or he has depending on context. She's and it's work the same way. Pick any reference.
- http://dictionary.cambridge.org/dictionary/american-english/he-s
- http://www.merriam-webster.com/dictionary/he's
- http://oxforddictionaries.com/definition/he%27s?q=he%27s