One who has made a turnip lantern in his youth will seldom be at a loss to extemporise a shelter for his bit of candle.
He was expected to be in a position to extemporise at any time and under any conditions a fugue, or a set of variations on any theme given to him; and his ability in this respect was the criterion by which he was judged.
To this followed the sermon, then the Communion, during which he had to extemporise another prelude to a chorale, and the service concluded with a voluntary on the organ.
The musicians accompanied the king and Bach from one room to another; and after the latter had tried all the pianos, he begged the king to give him a fugue subject, that he could at once extemporise upon.
He studied much over his lectures; but as to the form, he was wont to extemporise a great deal.
Best of all they liked to extemporise a chorus out of popular songs, comic or jocular, weaving them into a harmonious whole while declaiming the words of each.
Once at the pianoforte, and in a genial mood with his surroundings, he would extemporise for one and two hours at a stretch, amid the solemn silence of his listeners.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "extemporise" in a variety of sentences. We hope that you will now be able to make sentences using this word.