1. The most famous example is: "IF I WERE you, I would fly to the moon." Of course, I am NOT you. So I use the subjunctive "were." Many native speakers do not use the subjunctive, so they just use "was." ***** In the United States, many people still use the subjunctive. For example: "I demand / request / order that you BE here on time tomorrow!" We use the subjunctive there because it is ONLY my demand or request or order. (Some English speakers do not use the subjunctive. They might say: "I demand you ARE here on time tomorrow.") "I request that Mona WEAR (not: "wearS") a blue dress tomorrow." ("Wear" is the subjunctive. "WearS" would be used in a sentence such as "Mona wearS a blue dress every day." That's a fact. The subjunctive is NOT fact.)