Have a subject and verb can stand alone as complete sentence?

Yes, a subject and verb can stand alone as a complete sentence, but only if they form a complete thought.

Here's why:

* Subject: The subject is who or what the sentence is about.

* Verb: The verb tells what the subject is doing or being.

Examples:

* The cat sleeps. (Subject: cat, Verb: sleeps)

* He runs. (Subject: he, Verb: runs)

* She laughs. (Subject: she, Verb: laughs)

Incomplete Sentences:

A sentence with a subject and verb might not be complete if it doesn't express a full thought.

* The cat (This is missing a verb)

* Sleeps (This is missing a subject)

Key takeaway: A subject and verb are essential for a complete sentence, but they need to work together to create a meaningful statement.