Definition:
The principal verb in a verb phrase made with an auxiliary.
Examples:
- "The man who has received a benefit ought always to remember it, but he who has granted it ought to forget the fact at once."
(Demosthenes) - "We are all worms, but I do believe I am a glowworm."
(Winston Churchill) - "I'll be seeing you
In every lovely summer's day
In everything that's light and gay
I'll always think of you that way.
(Sammy Fain and Irving Kahal, "I'll Be Seeing You" - "After I die I shall return to earth as the doorkeeper of a bordello, and I won't let a one of you in."
(Arturo Toscanini)

