Sulfur doesn't "borrow" electrons. It forms covalent bonds by sharing electrons with other atoms.

Here's why:

* Sulfur's Electron Configuration: Sulfur has 6 electrons in its outer shell. It needs 2 more electrons to achieve a stable octet.

* Covalent Bonding: Instead of gaining electrons outright, sulfur forms covalent bonds with other atoms. This involves sharing electrons to achieve a stable octet.

Therefore, sulfur doesn't "borrow" electrons. It shares them in covalent bonds.

For example, in a sulfur dioxide (SO2) molecule, sulfur forms two double bonds with oxygen atoms, sharing two electrons with each oxygen atom.