The words They’re, Their and There are homophones, meaning words that are spelled differently and have different meanings but all share the same sound or pronunciation. These three are particularly hard to remember, not only for people learning a second language but even for native English speakers.
The word ‘they’re’ is a contraction of the words they and are. It is a shorthand way of saying “they are.” The fact that there is an apostrophe can help you remember that there are two words connected. Example:
They’re coming to dinner with us tonight. (The are coming to dinner with us tonight.)
The word ‘their’ is used to describe when something is owned by a group of people. A good example would be:
We will have dinner at their house.
There is a subtle difference in the way most people pronounce “they’re” and “their” but they are similar enough to cause confusion when not used in the correct context.
Finally, the word ‘there’ denotes a physical place. You can use it like this:
Put your books over there.
There can also be a pronoun used to introduce a noun or a phrase. An example would be:
Is there some reason you came to class late?