Tom sees that Spike is approaching, and decides he had better act quickly.

If you want to see them sharp and large, you'd better act now.

"Every one of them wants to look the part, so they can better act the part."

And if people of either party are serious about change, they better act fast.

I think," he said to the King when they were alone, "that we'd better act fast.

They don't exactly own the planet, but you better act like they do.

She may make you act better, but hurt your character.

We'd better act properly before the whole food chain is contaminated.

Up until then, we'd all better act sort of meek.

One person can act drunk or better still appear to be having an epileptic fit.