A brief summary about zero and first conditional.

1. The zero conditional is used to express universal facts.
If present simple, … present simple.
If the water boils, it evaporates.
If you eat too much, you get fat.
If you scare a snake, it bites you.
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2. The first conditional is used to talk about real
situations.
If present simple, … future simple (will)
If you come for the weekend, we will go to the cinema.
If you park here, you will get a pain.
If I save enough money this month, I will buy a new laptop.
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