If/unless + Present Simple, will/won’t + V1
Conditional 1 is used to talk about real or possible situations in the future.
E.g. If I have some free time, I’ll call you.
If she wins, she’ll be the happiest person on earth.
If I don’t understand something, I’ll ask.
We won’t go hiking if it rains.
Unless= if not
You won’t succeed unless you work hard.
She won’t come to the party unless she changes her mind.
*Other conjunctions: provided that, providing, as long as
Note:
a)We can use the imperative in the main clause:
Let me know if you don’t get the e-mail.
b)We can use modal verbs instead of ‘will’:
If you pay for the membership, you can also use the swimming-pool.
If you show him your painting, he might like it.
I may come to the conference if I’m not busy.
c) We can use ‘to be going to’ instead of ‘will’:
If I earn enough this month, I’m going to buy a car.
d) We can use Present Perfect instead of Present Simple in an ‘if-clause’
If you have finished by that time, I’ll pick you up.
Future time clauses
when, as soon as, until, before, after +Present Simple, will/won’t + V1
When the spring comes, I’ll start going to the gym.
I’ll inform you as soon as I get some update.
