What's a conditional in english?

     It's a kind of tense that is used to describe the result of something that might happen or might have happened but it didn't . They are actually some of the most useful structures in English and are commonly included in daily conversations. There are two kinds of conditional sentences: real and unreal. Real Conditional describes real life situations. Unreal Conditional describes unreal, imaginary situations.

     Right now exist four kinds of conditionals.
               -The Zero Conditional.
               -The First Conditional.
               -The Second Conditional.
               -The Third Conditional.