* Subject: A sentence needs a subject, which is the person, place, or thing performing the action. The verb tells *what* is being done, and the subject tells *who* or *what* is doing it.
Example:
* Verb: *ran* (This doesn't tell us who or what ran)
* Sentence: *The dog ran.* (Now we know *who* did the running)
* Complete thought: A sentence must express a complete thought. It can't be just a verb; it needs to tell us something meaningful.
Example:
* Verb: *singing* (This is incomplete; it doesn't tell us what is being sung or who is singing)
* Sentence: *The birds are singing.* (Now we have a complete thought)
In summary: A complete thought requires a subject and a verb, working together to convey a meaningful idea.