The time had come to begin thinking about his future.

Soon they would begin thinking about getting on with business.

I began thinking about ways to get a message to her.

Today is a good time to begin thinking about it.

If you begin thinking along these lines, by all means take a week off.

And I began thinking about how bad the environment is for children.

It was time to begin thinking about having a son of his own.

It was difficult to find a place even to begin thinking about all this.

Both parties and the nation's leaders should begin thinking now about how to turn that feeling around.

It was time to begin thinking about making camp for the night.