① The subject of imperative sentences is generally called you by the second person, but it is generally omitted, and the predicate verb is based on the verb prototype. The negative form of imperative sentence is: don't+the prototype of verb.
Please peel three bananas for me. Please peel three bananas for me.
Be quiet,please. Be quiet,please.
Don't talk loudly in the classroom. Don't talk loudly in the classroom.
Dave, come here. David, come here.
(2) Imperative sentences with first and third person subjects, whose affirmative form is: Let+ first person (I, we)+...; Let+ the third person (he/she/it/them) or the noun+………, and its negative form is: Let+sb. +not+ verb prototype+…/Don't let +sb. +Verb prototype
Let me have a try. Let me try.
Let Tom go there by himself. Let Tom go there by himself.
Don't let them play with fire. Don't let them play with fire.
The auxiliary verb do can be used to emphasize the mood before affirming the imperative sentence, but this structure is only used in the first-person imperative sentence and the second-person imperative sentence without subject.
Please be quiet for a while. Be sure to be quiet for a while.
Do let me go. Do let me go.
(3) Imperative sentences can be expressed by nouns and adverbs. Except predicate verbs.
Help! Help! Be patient! Be patient!
Hurry up! Come on! Hands up. Hands up.
Rewrite imperative sentences and declarative sentences
Imperative sentence = You must ... For example.
Come here. You have to come here.
Come here. You have to come here.
Don't do that again. You can't do that again.
Please+imperative mood = Would you like to (please) ... for example.
Please help me. Please help me. Will you help me? Will you help me? )
Please come here on time. Please be here on time. Can you (please) come here on time? Would you please arrive on time? )