N- Negator: Auxiliary verbs are used to negate utterances. I came- I DID not come.
I- Interrogation: Auxiliary verbs can be used to change the form of a sentence from statements to questions. Kunle likes rice- DOES Kunle like rice?
C- Code: By code we mean that auxiliary verbs can be used to shorten expressions, especially when the expression can be understood in the light of an earlier expression. Tunde can drive very well. I think Femi also CAN.
E- Emphasis: Auxiliary verbs can be used to emphasize a speaker’s point. Kunle: Does Femi drive? Bisi: Yes, he drives. Kunle: Are you sure? Bisi: He DOES drive.
