•		In the 2nd persons of the singular and of the
	plural, the negative imperative is constructed
	thus:
			do not (or don't) + infinitive without to

	Example: 	Don't touch that.
						Don't be silly!

•		In polite speech, in the 1st person of the plural,
	the negative imperative is formed thus:

			let + us + not + infinitive without to

	Example: 	Let's (us) not argue.