Were the_____police armed, we would have gun battle in the streets ____________________________________________________________.
     The shops don't deliver now, which makes life difficult.
             Life would________be easy if the shops delivered now________________________________________________________.
      He's very thin; perhaps that's why he feels the cold so much.
           He wouldn’t__feel the cold so much if he wasnot thin__________________________________________________________
          We haven't any matches so we can't light a fire.
                 We could___light a fire if we had some matches_____________________________________________________________
           It rained all the time. Perhaps that's why he didn't enjoy his visit
               He would_________have enjoyed his visit if it have not been rained all the time ________________________________________________________.
           I didn't work hard at school so I didn't get a good job when I left.
               Had I____worked hard at school, i would have got a good job when i left __________________________________________________________________.
           They used closed-circuit television. That's how they spotted the shop-lifter.
               Had it_ not been for the closed circuit tv, they would not have spotted the shoplifter