Question

does carbon forms tetra covalent bond with other carbon

Answer 1

4 covalent bonds, yes

Answer 2

yah

Answer 3

Carbon " does " from tetra bonds with other carbons atoms ; Diamond is the example .

However , if your question is
" Why two carbon atoms do not form tetra bonds with each other "

The reason is __ [ to have those bonds ; all Four Pairs of Electrons must be present between two carbon atoms and only on " one " side of each Carbon atom ( which is Geometrically Impossible for all kind of Orbitals and Hybrid Orbitals ) ] .