It is possible to improvise the whole scene with 'yes' and 'no'.

The second time they went through it, the musicians began to improvise.

Consider which small first-aid items are most necessary, and hardest to improvise.

All I could do was improvise desperately and hope for the best.

A faltering start, unsure whether to read his material or to improvise.

In cloudy weather you can improvise a game on the dining-room table.

Under the influence of the spell, the great composer began to improvise.

Young and his band exaggerate their stage personas and improvise their lines.

His guests improvise so well you can't believe it's off the cuff.

How to improvise the Turkish Bath in your own home, without apparatus.

He was such a controlling driver-notonce did he let me improvise.

They had to improvise lodgings for the new consignment of mutilated humanity.

He was thinking he could unbolt the bookshelves, maybe improvise some benches.

So if this crew managed to improvise on the go, I'm impressed.

And I did my best to improvise a scheme of motives yesterday.

I want our starfighters to break formation and improvise, firing at will.