- A complete subject is all the words that make up the subject. It includes all the words that tell whom or what the sentence is about.
- The simple subject is the key word or words in the complete subject of a sentence. The simple subject tells whom or what the sentence is about.
The brown baby birds waited for their mother.
Complete subject: The brown baby birds
Simple subject: birds
The big red truck zoomed down the road.
Complete subject: The big red truck
Simple subject: truck
The brightly shining sun peeked out from behind the clouds.
Complete subject: The brightly shining sun
Simple subject: sun