There, their and they're sound exactly the same, but they do three different jobs.
1. There → a place, or something that exists
- Put the box over there.
- There is a problem with the printer.
- There are two ways to do it.
Trick: "there" contains "here", another place word.
2. Their → it belongs to them
- The kids forgot their coats.
- My neighbours are selling their house.
- Everyone did their best.
Trick: "their" is always followed by the thing they own: their car, their ideas.
3. They're → they are
- They're late again.
- I like my colleagues: they're very kind.
Trick: replace it with "they are". If the sentence still works, write "they're".
4. All three in one sentence
- They're parking their car over there.
5. Common mistakes
- ❌ Their going to be late.
- ✅ They're going to be late.
- ❌ The students handed in there essays.
- ✅ The students handed in their essays.
- ❌ I left my keys over their.
- ✅ I left my keys over there.
