11. Be quiet or the teacher will be angry.=>If………………………………………………………………………..
12. I don't tell him the answer because he isn't at home.=> If ………………………………………………………………………..
13. My friend and I don't have enough money, so we will not buy a house of our own.=> If ………………………………………………………………………..
14. Unless the weather is better now, we can't go for a walk.=> If ………………………………………………………………………..
15. Because I don't know his address, I don't give it to you.=> If ………………………………………………………………………..
11. Be quiet or the teacher will be angry.=>If…you aren't quiet, the teacher will be angry ……………………………………………………………………..
12. I don't tell him the answer because he isn't at home.
=> If ……he were at home, I would tell him the answer…………………………………………………………………..
13. My friend and I don't have enough money, so we will not buy a house of our own.
=> If …………My friend and I had enough money, we would buy a house of our own. ……………………………………………………………..
14. Unless the weather is better now, we can't go for a walk.
=> If ……the weather isn't better now, we can't go for a walk. …………………………………………………………………..
15. Because I don't know his address, I don't give it to you.
=> If ……………I knew his address, I would give it to you. …………………………………………………………..