Quote Originally Posted by Gottimhimmel View Post
What does ABL stand for, and thank you, but any more elaboration?
Can these constructions change with case, and could you please make some sentence examples?
Ablative case.

The first pronoun takes the nominative case, the second takes the ableative (instrumental) case.
If you need to decline it, the form of the first word will be changed.

Мы с ними

Мы с ними идем в парк.
Не забудьте позвать нас с ними в парк.
Нам с ними очень понравилось в парке.