Examples

Any grammar champ can tell you that this is an exclamatory sentence. It expresses a strong emotion: happiness. That exclamation point at the end is also a good tip-off, but don't get too relaxed: an imperative sentence can also end in an exclamation point if the speaker is issuing a forceful command or request.

Butter substitutes have never fooled anybody except, once upon a time, Fabio. And you shouldn't be fooled into thinking that this sentence, with its strong disbelief and an exclamation point, is anything other than an example of an exclamatory sentence.

This memorable line from Dumb and Dumber expresses Lloyd's outrage at his and Harry's terrible situation. They're out of food. They're out of work. And Harry's parakeet has just met a tragic end.