Long form possessive adjectives and pronouns

Question

Modelo: Mis periódicos Los periódicos míos

my questions 1) la pizza de Alberto y de Mercedes i put) La pizza de suyos.. said it was wrong

2) El carro de nosotros El carro de nuestros

3) tus buenos amigos Buenos amigos tuyos.

what am I doing wrong? thanks in advance,

Answer 1

So in your first example you just had míos, is there any reason why you added 'de' before 'suyos' for your second one and 'nuestros' for your third one?

Perhaps this book will help ...

Who does this belong to?

Answer 2

I am not particularly good at explanations, but look at this;

El coche de mis hermanos. El coche suyo.

El perro tuyo y mio. El perro nuestro.

Tus camisas planchadas. Las camisas planchandas tuyas.

A few examples I hope it helps.