2. if you don't lock your car, someone will steal your radio.
unless you don't lock your car, someone will steal your radio.
lock your car or someone will steal your radio.
3. if you don't write down the number, you won't remember it.
unless you write down the number, you won't remember it.
write down your number or you won't remember it.
4.if you don't go away, i will call the police.
unless you go away, i will call the police.
go away or i will call the police.
5. if you are not early, you won't get good seats near the front.
unless you are early, you won't get good seats near the front.
be early or you won't get good seats near the front.
