A kernel sentence is a simple, active, declarative, affirmative sentence that serves as the foundation for generating more complex sentence structures through transformation.
Characteristics of a kernel sentence:
It is positive (not negative)
It is active voice (not passive)
It is affirmative declarative (not interrogative)
It is simple, not compound or complex
Example:
"The boy kicks the ball." → This is a kernel sentence.
Passive: The ball is kicked by the boy.
Negative: The boy does not kick the ball.
Interrogative: Does the boy kick the ball?
These transformed versions are not kernel sentences.