If you clean the floor,, you can use the new mop., If you cleaned the windows,, they wouldn't have fingerprints., I'll buy you a pizza,, when I get paid next week., I'd buy you a diamond, if I could afford one., If we had left earlier,, We would have missed the train., Unless we leave now,, we'll miss the bus., We'll run out of petrol, if we don't fill up the tank soon., We'd use less petrol, if we didn't drive everywhere., When I go to London,, I'll stay with some friends., If I went to London,, I'd visit Buckingham Palace.

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