... you could: . Ex: If you could open your book, please. If + Subject + should + ..... + imperative. Ex: If you should find any dificulty in using that TV, please call me this number. 3. Should ... Ex: If I had enough money now, I would buy this house . Ex: If I were you, I wouldn't do such a thing. 2. Past unreal condition If + S + had + P III/ED - S + would(could, shoult,might) + have ... her. 25.‘When you go through Bayeux you must see the tapestry,’ he told me. 26.He said, ‘You must walk faster; you are far too slow.’ 27.‘You mustn’t forget to put the stamp on or your friend will...