Possessive 's or is?

He's my friend

• He's - possessive

• He's - he is

My name's Davis.

• name's - name is

• name's - possessive

His dog's name is Joy.

• dog's - possessive 's

• dog's - dog is

Janet's car is blue.

• Janet's car - possessive 's

• Janet's car - Janet is

It's mine!

• It's - It is

• It's - 's possessive

They're Mary's pens.

• Mary's pens - possessive 's

• Mary's pens - Mary is

He's in class.

• He's - possessive 's

• He's - He is

She's having lunch.

• She's - possessive 's

• She's - she is

It's John's book. Which is correct?

• It is John's book.

• It's John is book

Which is the possessive 's?

• He's Mary's brother.

• He's Mary's brother.