Learn Spanish (Latin America): ¡No uses mi cable con ese enchufe!

This is a negative informal command telling someone (tú) not to do something. In Spanish, negative commands always use the present subjunctive form of the verb. So, the regular present tense usas (you use) becomes the subjunctive no uses (don't use).

How could we use mientras (while) with this sentence?

Commands like no uses set up a future context. If you added a condition to this command, you would use the subjunctive rule from this lesson! For example, "Don't use my cable while that plug is wet" translates to: ¡No uses mi cable mientras ese enchufe esté mojado!

I always mix up "ese" and "eso". Why is it ese enchufe?

Ese is the masculine singular adjective for "that," used right before a masculine noun like enchufe. You only use eso when referring to an abstract idea, a situation, or an unknown object (for example, "What is that?" = "¿Qué es eso?"). Eso never goes directly before a noun.

Can enchufe refer to both the plug and the wall socket?

Yes! In everyday Latin American Spanish, enchufe is used for both the plug at the end of the cable and the receptacle on the wall. If you ever need to be more specific, the wall socket is a tomacorriente and the plug itself is a clavija.