Respectful means 'full of respect'
Respectable means 'worthy of respect'
Respective means 'relating to a particular person,thing'.
1. It is our duty to be respectful to our parents.
2. A respectful glance.
1. He comes of a respectable family.
2. Respectable behaviour.
1. After the game was over the boys returned to their respective houses.
2. Ram and Sham went to their respective homes.