not
In everyday conversation, "not" is very often shortened to "n't" and attached to the auxiliary verb (e.g., "do not" becomes "don't", "is not" becomes "isn't"). Using the full form "do not" instead of the contraction is usually done for emphasis or in formal writing to sound more serious. When using "not" with the verb "to be," it typically follows the verb (e.g., "I am not"), whereas with other auxiliary verbs, it sits between the auxiliary and the main verb (e.g., "I cannot go").
💬Casual Conversation
🎬Tuesday afternoon, Chloe is in the library and Leo is gaming in his room.
Chloe Smith
Did you tell mom I'm pulling an all-nighter at the lib?
Leo Smith
I did not. You owe me a twenty.
💡
The word 'not' is central here as it confirms the secret remains kept, creating the basis for Leo's leverage to extort money from his sister. Chloe uses the idiom 'pulling an all-nighter', meaning staying awake all night to study.