Matching Pairs first conditionalOnline version First conditional by Andrey Parada Gómez 1 Structure of first conditional 2 Present simple 3 Future simple 4 Example of first conditional 5 First conditional expresses a spontaneous decision, an assumption with regard to the future or an action in the future that cannot be influenced. If it rains, I won't go to the park. It's used to talk about things which might happen in the future. Of course, we can't know what will happen in the future, but this describes possible things, which could easily come true. For repeated or regular actions in the present time period. If + present simple + future simple