if to unless conversion
1.- if nobody helps me, i’ll get into trouble.
i’ll get into trouble unless somebody helps me.
2.- i won’t know anything about my friends if they don’t write to me.
3.- they wouldn’t have bothered you if they hadn’t needed your help.
4.- if there isn’t a traffic jam, we’ll be home by five o’clock.
5.- people don’t go to the doctor if they aren’t ill
6.- i’ll punish you if you don’t tell me the truth
7.- they won’t invite you to their party if they don’t know your phone number.
8.- they won’t give you the job if they don’t like your appearance.
9.- if you don’t finish your homework now, i won’t let you watch tv.
10.- i won’t phone you if there isn’t anything urgent.
11.- i wouldn’t invest all this money if i weren’t sure i would get it back.
12.- if you don’t get up early, you’ll miss your train.
13.- i wouldn’t have asked him any questions if he hadn’t been ready to answer them.
14.- we won’t go fishing if the weather isn’t fine.
15.- i won’t ask him to write if he doesn’t want to.
16.- i never hitch-hike if it isn’t absolutely necessary.
17.- if i don’t know anything about him in two days, i’ll report his disappearance to the
police.
18.- she wouldn’t save any money if she didn’t want to buy a house of her own.