The first group is your or you're. If you can substitute the words 'you are' in place of your and it sounds right then the spelling is YOU'RE.
1-Your house is nice.
2-You are house is nice.
#2 is wrong, so the spelling is YOUR, choice #1
1-Your due at the show by 5:00.
2-You are due at the show by 5:00.
#2 is correct so use YOU'RE...okay?!
Group 2...there, their, they're
They're there at their house....confused?
Again, if you can substitute 'they are' and it sounds correct, use THEY'RE. In my example: They are there at their house.
THERE...is a place/location word and inside is another location...here...tHERE. So if you are (or you're) referencing a place, use there.
Last one...their. They're there at THEIR house. Whose house? THEIRS!!! It belongs to them.
I just finished reading a popular craft blog with thousands of visitors monthly, thousands, and both you're and their were misused. Don't rely on spell check. It will not pick this up but your readers may and be turned off by what you're
saying because you don't know how to