Apostrophes

The spiders web was as large as a car tire.

The spider's web was as large as a car tire.

The spiders' web was as large as a car tire.

The spiders's web was as large as a car tire.

My parent's house is decorated with items collected from their travels.

My parents house is decorated with items from their travels.

My parents' house is decorated with items from their travels.

My parents house's are decorated with items from their travels.

Judy's and Bob's daughters bought them tickets to a Broadways show for their anniversary.

Judy and Bobs daughters bought them tickets to a Broadway show for their anniversary.

Judy and Bobs daughters' bought them tickets to a Broadway show for their anniversary.

Judy and Bob's daughters bought them tickets to a Broadway show for their anniversary.

They're running late to practice.

There running late to practice.

Their running late to practice.

Theyr'e running late to practice.

Its easier to follow than it is to lead.

It's easier to follow than it is to lead.