These words all sound alike BUT they are not interchangeable.

In their haste, some of the greatest critics of everything else on this FORUM also have an annoying tendancy to use these three words as if they were synonyms - they are not:

There is an adverb specifying a place; it can also be an expletive. Adverb: Sylvia is lying there unconscious. Expletive: There are two Comps left to find for the BPO.

Their is a possessive pronoun. Fred and Sylvia finally completed their BPO. They were later than usual with their submission today.

They're is a contraction of they are. Fred and Sylvia will soon find that they're going to be docked for their tardiness. They're going to be very cranky !

Just an observation.

P.S. Fred and Sylvia are fictitious REALTORS®
Dale C. Hittle of GOLDEN RULE PROPERTIES in Glover, Vermont
Where We're Always Striving To Put Together "THE FAIR DEAL"