They are the four things a noun can be.
What are "people, places, things, and ideas"?
It is the main thing that teachers do?
What is teach?
“Four score and seven years ago...”
Who is Lincoln?
It is the subject of the following sentence: “I have won!”
What is “I”?
It is one of the adverb questions.
What is "when"? (Also acceptable: “where, why, and how”)
It is the noun for a person who plays the piano.
What is "pianist"?
It is the main thing that students do.
What is one study?
“Open here I flung the shutter...”
Who is Poe?
“Every good boy deserves fudge.”
What is "boy"?
It is two of the adjective questions.
What is "which and how many” (or “whose and what kind”)?
It is the kind of noun that you cannot experience with the five senses.
What is an idea/ abstract noun?
It is the main thing that pilots do.
What is fly?
“If I were two-faced, would I wear this one?”
Who is Lincoln?
“Why is the sky blue?”
What is “sky”?
It is an adverb that answers where purple unicorns exist on Earth.
What is “nowhere”?
It is the noun for a person who plays the flute?
What is “flautist”?
It is the main thing that scientists do.
What is experiment?
“If you tell the truth, you don’t have to remember anything.”
Who is Twain?
“Help!”
What is “you”?
It is an adjective that answers when pigs will fly.
What is “never”?
It is the noun where Danish people come from.
What is Denmark?
It is the main thing that firemen do.
What is rescue?
“The report of my death was an exaggeration.”
Who is Twain?
“Licking your elbow is impossible.”
What is "licking your elbow"?
It is a word that can be an adjective or an adverb.
What is "fast"? (Also: daily, yearly—etc.)