Just as a recap from the previous lesson, here we have a quick explanation about the zero conditional.


Now, today we are going to learn about the first conditional.

The First Conditional

The first conditional has the present simple after 'if', then the future simple in the other clause:

·         if + present simple, ... will + infinitive

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.

·         If it rains, I won't go to the park.

·         If I study today, I'll go to the party tonight.

·         If I have enough money, I'll buy some new shoes.

·         She'll be late if the train is delayed.

·         She'll miss the bus if she doesn't leave soon.

·         If I see her, I'll tell her.

First vs. Zero Conditional:

The first conditional describes a particular situation, whereas the zero conditional describes what happens in general.

For example (zero conditional): if you sit in the sun, you get burned (here I'm talking about every time a person sits in the sun - the burning is a natural consequence of the sitting)

But (first conditional): if you sit in the sun, you'll get burned (here I'm talking about what will happen today, another day might be different)

 Let´s practice what we have learned. 

Taken from: https://www.perfect-english-grammar.com/first-conditional.html