>1. HE isn;t a dog. He doesn't bite his neighbour's terrier.
If he were a dog, he would bite his neighbour's terrier.
>2. You need to go to London to see Big Ben.
If you want to see Big Ben, you need to go to London.
>3. The alarm will go off. He will jump out of bed.
If the alarm goes off, he will jump out of bed.
>4. I need to get this to her but I dont have her telephone number.
If I had her telephone number, I would get this to her.
>5. He doesn't shave too often. He doesn't look good.
If he shaved more often, he would look good.
>6. She didn't cancel the milk, so the milkman keeps delivering it.
If she had cancelled the milk, the milkman wouldn't keep delivering it.