1.If you gave the young boy this stick, he’d hurt himself.
2.If they listened carefully, they might hear that sound.
3.I wouldn't go there unless I had enough money.
4.If he washed his feet more often, his girlfriend would visit him more often.
5.Manh would read the newspaper if he went by train.
6.If I had a typewriter, I would type it myself.
7.You could make better progress if you attended class regularly.
8.If I knew his telephone number, I’d give it to you.
9.A lot of people would be out of work if the factory closed down.
10. If I were asked, I would express my feelings.
11. He mustn't drive unless he has a driver's license.
12.She won't go there unless he calls her.
13.Unless you are tired let’s go for a walk at the park.
14.I won't forgive him unless he apologizes to me.
15.I get very hungry at work unless I have breakfast in the morning.
16.I would go there unless I had enough money.
17.She would come with us unless she were so ill.
18. Unless she works hard, she won't get a good mark on the English test.
19.Unless I were sick, I would be at work.
20. Unless he had a passport, he couldn't go abroad.
21.If the cat hides in the tree, the dog can't find it.
22.If we meet at 9:30, we will have plenty of time.
23.If you spoke louder, your classmates would understand you.
24.If I study, I will pass the exams.
25.If the sun shines, we will walk into town.
26.If she earns a lot of money, she will fly to New York.
27.If he has a temperature, he will see the doctor.
28.If Peter wears sandals in the mountains, he will slip on the rocks.
29.If Giang forgets her homework, the teacher will give her a low mark.
30.If my friends come, I will be very happy.