Answer:
A conditional sentence is a sentence that expresses a condition. A condition is something that can only happen if something else occurs.
A conditional sentence contains an independent clause and a dependent clause that almost always begins with “if.”
There are five types of conditional sentences:
Zero Conditional = If you heat ice, it melts.
First Conditional = If she saves money, she will buy a new car by December.
Second Conditional = If it didn’t rain, we would go on a picnic.
Third Conditional = If you hadn’t lied to me before, I would have believed you.
Mixed Conditional = You could have been on time if you had caught the bus.
Explanation:
In zero conditional sentences, the tense in both parts of the sentence is the simple present.
It is possible and also very likely that the condition will be fulfilled.
It is possible but very unlikely, that the condition will be fulfilled.
The third conditional is a structure used for talking about unreal situations in the past.
Mixed conditionals are conditionals where the tense in the main clause is different from the tense in the conditional-clause
