What is a sentence using the word give up?

Give up is two Words. Nevertheless... The police asked the fugitive to give up and lay down his weapons.

Give up is called a phrasal verb and functions as a single Word. It has more than one meaning. It has the meaning of surrender (as in the sentence above) and also the meaning of to stop doing something.

I want to give up smoking.

Because it is a verb give up can also have other forms eg giving up / gives up / gave up / has given up

I am giving up drinking this year.

She gave up smoking last year. I have given up smoking for 5 years.