Contractions, everyone's favorite writing words. I'm just gonna say that I love them too, but a problem a lot of people have is they're not sure when to use them. It's rather tricky, I suppose, to know the grammatical difference between ownership and joint words. Let me help you!

Words that will always be contractions:

They're

She's 

He's 

Don't 

Can't

I've

Won't

Y'all

I'm also briefly going to go over possessives:

Its (not it's -  that's 'it is')

Their (they own)

(Insert name here)'s

Her

His

then there's also plural possessives like 

Girls'

Boys' 

Children's

Homophones!

Homophones are words that sound the same but are spelled differently and mean different things, for instance, there, their, and they're

There (place)

their (they own)

they're (they are)

pear (fruit)

pair (a group of two; duo)

to (expressing motion in the direction of (a particular location) or  identifying the person or thing affected)

too (as well)

two (the number)

you're (you are)

your (you own)

Just to name a few.

Homonyms: words that are spelled the same and sound the same, but mean different things.

bear (animal)

bear (carry or support)

tear (water droplet)

tear (a rip in something)

read (look at and comprehend the meaning of (written or printed matter) by mentally interpreting the characters or symbols of which it is composed.)

read (past tense of the definition above)

and so on.