1.  Addie and Stella should eat before they went to the concert.

2.  We ought not play the music so loud when the neighbors are trying to sleep. 

3.  Betty will work at the market for two years by January.    

4.  They would not allow us to hold the rally if we hadn’t had a permit.    

5.  Thomas should study more, then he would have passed his exams.    

6.  Spielberg directed a great movie, so he must do months of planning.    

7.  If you didn’t want the last piece of cake, you should say something.   

8.  You should not go swimming if you felt ill.    

9.  Aunt Tilly didn’t need make so much food for the picnic, but she did.     

10.  He must be exercise for several months because he has lost a lot of weight.  

11.  Will the Browns be visit the seashore this year?     

12.  Paul doesn’t have talk in class, but his teacher prefers that he does.    

13.  Rhonda may as well leave the movie early—nothing exciting happened at the end.    

14.  William could have relax by now, if he had finished his work.    

15.  I had forget where my keys were, but Mike remembered.