What is an imperative sentence? Which of the following sentences are imperative sentences? No, what's his sentence?

The function of imperative sentences is to ask, request or order, advise, persuade and advise others to do or not do something. Exclamation marks are usually used at the end of imperative sentences, but some imperative sentences are weak in tone and can be ended with a period. Imperative sentences can end with the modal particle "ba" or not. Imperative sentences can express orders, requests, prohibitions, discouragement, etc. The subject in imperative sentences is often omitted.

I beg you, for God's sake, get me out of here.