1. It is too bad Helen isn’t here. If she (be)                  here, she (know)                  what to do.

2. If I (not eat)                  breakfast tomorrow morning, I (get)                  hungry during class.

3. If you (put)                  this red button, the TV will (turn off)                 .

4. I (let)                  you know if I (find)                  out what’s happening.

5.  He didn’t listen to the teacher. If he (listen)                   carefully, he (perform)                   well in the examination.

6.  He’s waiting for his mother to come back from Chicago. If his mother (come)                     home, he (have)             a lot of presents.

7. He wanted to buy some Christmas presents but he couldn’t. If he (afford)                  to buy, his children (be)    very happy to greet a new year.

8. It (be)                  quicker if you (use)                  a computer.

9. (bring)                  him another cake if he (not/like)                  this one.

10. She (be)                  angry if she (bear)                  this tomorrow.