We will not go out if it snows.
If you don't believe me, I won't believe you.
If you don't try, you won't get the job.
2.unless 除非 = if...not
You won't get the job unless you try.
= You won’t get the job if you don't try.
= If you don't try, you won't get the job.
You won't pass the test unless you study hard.
= You won't pass the test if you don't study hard.