If you find English grammar hard, you'll have to study a lot.
If I give you a hand with that job, we'll finish faster.
If you're nice to people, they'll be nice to you.
If it rains later, we'll get wet.
I 'ĺl to be angry if you're late again.
If I have time, I'll come over later.
The situation will be hopeless if I don't speak to you right now