One of the boys will give a demonstration in a while.

That is never an easy way to learn, especially when you are going to give a demonstration the next day.

Now that you've had a chance to try them, maybe we should give you a real demonstration.

He has given demonstrations about this on radio and television.

I did, and wanted to give him a demonstration this very minute.

"Perhaps they will give us a further demonstration of their powers."

He had not planned on giving a free demonstration to these two.

"Do I have to give a demonstration of that tomorrow too?"

He worked on the figures, gave demonstrations, and taught students.

Customers are given a 30-minute demonstration and test run of their boat.