But the tone of the story gradually shifts to a more elusive register.

They enter in their stolen clothing, and the tone shifts to comedy again.

And I especially liked the way the tone shifted as the episode progressed.

Thus, the tone at the exchange has shifted dramatically.

Now the tone has shifted to one of living without such help, if necessary.

"That's a bit of all right," the driver said, his tone suddenly shifting.

"If we made it realistic, the tone would have shifted."

And in saying so, the tone of our conversation subtly shifts.

His tone had shifted from cool to icy, and the maid's eyes turned wary.

The tone jarringly shifts from one half to the other.