Is there a sentence with no noun?

It's tricky! While a sentence needs a verb to express action or state of being, it doesn't *strictly* need a noun. Here are a few examples:

* "Go!" (Imperative sentence, the subject "you" is implied)

* "Stop!" (Same as above)

* "Quickly!" (Adverb acting as the main part of the sentence)

These sentences technically have an implied subject (you) in the case of imperatives, but they do not explicitly state a noun. However, in most cases, sentences need a noun to make sense and have a complete meaning.