There, their and they're
There can refer to a place or introduce a phrase. Their is possessive. They're is the contraction of they are.
Your and you're
Your shows ownership, as in “your book.” You're means “you are.” Read the sentence with the expanded phrase to check it.
To, too and two
To can mark direction or form an infinitive. Too can mean also or excessively. Two is the number 2.
Use a substitution check
Replace the word with its meaning. If “they are” fits, use they're. If the sentence refers to ownership, use their. If it points to a place, use there.
Frequently asked questions
Why are homophones confusing?
Their pronunciation is the same or very similar, so spelling depends on meaning and sentence context.
How can I proofread them?
Read each sentence for meaning and replace contractions with their full forms to check whether the sentence still works.