The world will not change back to the way it was.

The world must change before he could ever face her again.

In a sense, I think the world around us changed.

But if the world has changed, the type of student who makes the walk is the same.

He was still trying to get used to how much his world had changed.

I came out seven years later, and the whole world had changed.

The world had changed a little and for the better.

The whole world had changed since then, and not for the better.

The world has changed in 50 years, but our values do not change.

And the world has changed in the past few years.