Which sentence uses their/there/they're correctly?

• A. Their going to their house over there.
• B. They're going to their house over there.
• C. There going to their house over there.
• D. There going to there house over there.

Answer: (B)

The important idea here is choosing each word by its function: they’re is a contraction for they are, their is a possessive determiner, and there is an adverb indicating location. In the correct sentence, the subject is they, so the verb form is are, which the contraction they’re represents. Then, to show ownership of the noun house, we use their before house. Finally, over there places the location, which is exactly what there does.

So the sentence reads naturally and grammatically: they’re going to their house over there.

The other options misplace or misuse one of these forms: using their before a verb feels ungrammatical; starting with there as a subject is incorrect because there is not a subject there; mixing there with household ownership also disrupts the proper roles of these words.