Punctuation Rules

I like cats dogs, and birds. I like cats, dogs, and birds. I like cats dogs and birds. I like, cats dogs and birds.

Possession None of the above Contraction of it is Plural

To introduce a list To join two independent clauses To show possession To end a sentence

The dogs's bone The dog's bone The dogs' bone The dogs bone

End a question Join two sentences informally Show possession Introduce a list or explanation