The first is about the present and is called the zero conditional, and the second sentence is about the future and called the first conditional. That was just a quick overview of the real conditional sentences, but it's not our focus for today. Today we're focusing on the 3rd conditional in English, also known as conditional III or the past
Type 3 conditional sentence. A type 3 conditional sentence refers to an impossible condition in the past and its probable result in the past. We are calling the condition impossible because we can't go back into the past and change it. What we do using a conditional sentence type 3 is regret what happened or didn't happen.
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