Had I known how crowded London would be, I would never have moved to this city.

I moved to London only because I was unaware of how many people were there.

Since it was so crowded in London, I decided that I would never move there.

In the end, London turned out to be far more crowded than I'd thought before moving there.

I would have had a better time living in London if only there hadn't been so many people.