A conditional sentence is a sentence structure commonly used in English to talk about something (a result) that may happen ONLY IF something else happens first (a condition).
There are 2 parts to a conditional sentence. These two parts are also called clauses.
Part 1 – the if or condition clause: the event that needs to occur; also called the dependent clause because it is not a complete sentence and is dependent on the 2nd part of the sentence.
Part 2 – the result or main clause, or what happens when the event in the if/condition clause occurs; also called the independent clause.