ABSTRACT
With an imperative do serves to express a strong entreaty, and is here exceptionally used with the auxiliary be:
Do come, there’s a good boy! Do be quiet!
Negation
28.21. In English as in other languages we have two tendencies which in some cases may conflict with one another. One is to put the negative word or element as early as possible, so as to leave no doubt in the mind of the hearer as to the purport of what is said; the other is to attract the negative to the verb of the sentence.
