Similar to the difference between “you’re” and “your,” there is a big difference between “they’re” and “their.” “They’re” is a contraction (combination between two words in which the vowel is replaced with an apostrophe) for “they are.” “Their” is a possessive adjective (word identifying an object as belonging to someone).
To tell someone that he or she is awesome, one would say, “You are awesome” or “You’re awesome.” The same method applies to “they,” only that word is plural, meaning “more than one.”
So, let’s say you like the Beatles. Someone asks you, “Why?” You want to say that they are awesome. Imagine taking the “a” out of “are,” replacing it with an apostrophe, and combining “they” and “are.”
They are awesome.
They + are
They + re
They’re awesome.
“Their” is a possessive adjective. When used in front of an object, “their” identifies the object as something THEY OWN. Because the word “they” is plural, “they’re” is often referred to as a plural possessive adjective.
They’re stupid.
I don’t like their stupid clothes.
If you were to substitute “they’re” in the first sentence with “their,” and “their” in the second sentence with “they’re,” the sentences no longer make sense.
Their stupid. (This leaves us wondering, “Their stupid what? They can’t own “stupid.”)
I don’t like they’re stupid clothes. (This is equal to “I don’t like they are stupid clothes,” which is not correct.)
“There” is commonly used as a pronoun, which takes the place of a noun. A noun is a person, place, or thing, such as “mother,” “school,” or “tree.” Pronouns include words such as “he,” “she,” “I,” or “us.”
“There” is, more specifically, a demonstrative pronoun because it refers to a noun whose identity is understood from the context of the sentence. Other demonstrative pronouns include “this,” “that,” “these,” “those,” and “here.”
In other words, a demonstrative pronoun refers to the number of the noun in the sentence or how far the speaker is from the noun.
There is my house.
I want to go over there.
I know that this last one is hard to swallow, but to oversimplify: “There” is a pronoun referring to a place (the noun) that is far away from the speaker.
Don’t let others convince you to use “they’re,” “their,” or “there” incorrectly. They’re wrong, so don’t follow in their footsteps. Just don’t go there.