Lesson 1
Incorrect: "Hurry up Miss Hawkeye! Your taking too long!"
Explanation: In this sentence, you are shortening the words "you are". If read it the long way, it would be "You are taking too long."
Correction: "Hurry up Miss Hawkeye! You're taking too long."
In short, "Your", "Yours", "Their", "Theirs", are all used to indicate possession.
"You're", "They're", are contractions for "You are" and "They are".
Lesson 2
Their, Theirs: Shows possession. "That Christmas ham is not ours, it's theirs."
There, There's: What something is, where it is, why, a state of being, etc. "Excuse me Colonel, but there is a large stack of unsigned papers on your desk."
Lesson 3
It's, its: This one seems to be confusing for people. "It's", contrary to the general rule, does NOT show possession, but instead stands for "it is".
"Its" on the other hand, DOES stand for possession. HEED IT.
>>>I will be updating this grammar lesson on occasion. -Cracks a whip-<<<