If I got down on my knees and I pleaded with you.If I crossed a million oceans just to be with you. If I climbed the highest mountain just to hold you tight.If I said that I would love you every single night.

Do they really happen？ What tense （时态）is used？

They’re unreal conditionals(非真实条件句）, a kind of the subjunctive Mood

Why?

Pay attention to the red parts.