"I don't remember a day when he hadn't slipped completely into his cups."

I let the day slip away without doing anything at all.

The days were slipping by now, and another week had almost gone.

As the days slipped by, I began to realize why she couldn't believe herself a robot.

The days were slipping away, and she was eager to share the news with him.

Happy, golden days slipped past like a dream of childhood.

The day had slipped away and she did not look forward to a night poring over their results at home.

Or had an entire day slipped past without his being aware of it?

The day was slipping away and Claire would begin to worry.

It was easy to become melancholy thinking how quickly the days slipped past.