1.  If Simon such a demanding job, he wouldn't get so stressed.  HAVE

2.  You to use your mobile unless you charge the battery first.  NOT BE ABLE

3.  I wouldn't have woken you up if you .  NOT SNORE

4.  If you to class yesterday, you won't know about the next exam.  NOT COME

5.   you your car more often if you could afford it?  CHANGE

6.  We'd be starving by now if we something before we left home.  NOT EAT

7.  Lily us by now if she wasn't having a good time.  CALL

8.  We the bank so much money now if we hadn't asked for such a big mortgage.  NOT OWE