① Ask prepositional phrases and words that are common in imperative sentences as subjects! For example, please, yes, no, why not d

(1)Do type (that is, verb prototype (+object)+other components). Please sit down here. Please sit here.

Some imperative sentences can be omitted when the meaning is clear. This way, please Please go this way. This way, please

(2)Be type (that is, Be+ predicative (noun or adjective)+other components). Be a good boy! Be a good boy!

(3)Let type (that is, Let+ object+verb prototype+other components). Let me help you. Let me help you.

● Negative structure:

(1)Do-type and Be-type negation are both formed by adding don at the beginning of a sentence:

For example:

Don't forget me! Don't forget me!

Don't make such noise. Don't be so noisy.

Don't be late for school! Don't be late for school! Don't be can be used in the system structure-that is, the one with no action verbs and only adjectives. Don't be can't be used in the case of action verbs, only in the case of action verbs. )

(2) There are two negative forms of "Let+ object+verb prototype+other components" and "let+object +not+ verb prototype+other components".

Don't let him go. /Tell him not to go. Don't let him go.

(3) some can start with no, which is used to express forbidden imperative sentences. No smoking! No smoking! No fishing! No fishing!

I. Affirmative imperative sentences

A. sentence pattern: verb prototype ~. (The second person calls it the imperative sentence of the subject, omitting the subject)

Stand up. Stand up.

Be quiet,please. Be quiet,please.

Be careful! Watch out!

B. Sometimes, do can be added before verbs in order to strengthen the mood.

Please sit down. Be sure to sit down.

Be sure to study hard. You must study hard.

C. When expressing imperative sentences in a polite tone, please can be added at the beginning or end of the sentence, but if please is added at the end of the sentence, a comma must be added before please.

This way, please This way, please

D. If there are occupations in imperative sentences, they must be separated by commas and placed at the beginning or end of the sentence.

Li Ming, come here. Li Ming, come here.

Come here, Li Ming. Come here, Li Ming.

E. comparison between imperative sentences and declarative sentences:

Statement: You sit down. You sit down.

Imperative sentence: sit down. Sit down (omit your topic)

B, negative imperative sentences

Sentence pattern: Don't /Never+ verb prototype ~

Do not swim in the river.

Don't be late. Don't be late.

Please don't make any noise. Please don't make noise.

Never answer the phone while driving. Never answer the phone while driving.

pay attention to

"No+ noun/gerund" can also be used to indicate prohibition, especially slogans.

No smoking! No smoking!

No parking! No parking!

No entry! No entry!

Don't litter! No littering!

"Rang" imperative sentence

I. Affirmative imperative sentences

Sentence pattern: let+ first person (me, us) ~.

Let+ third person pronoun (objective: he, she, it, them) or noun ~.

Let's go at once. Let's start at once.

Let me try that one more time. Let me try that one more time.

Let Tom go there by himself. Let Tom go there by himself.

pay attention to

Let us be tolerant of each other, and let us not be tolerant of each other. It is most obvious when using interrogative sentences.

Let's go, shall we? Let's go, shall we?

Let's go, shall we? Let's go, shall we? (Ask for the other party's opinion)

The imperative sentence headed by "let" is a common verb sentence pattern, and its main usage is as follows:

(1) means "suggestion".

The "let" in this sentence pattern is followed by the first person pronoun object.

For example:

Let me try.

Let's get started.

Let me look for it.

This sentence is euphemistic and more polite than the direct imperative sentence. Compare the following sentences a and b:

A. don't disturb him.

B.let's not disturb him.

(a) It is a direct order, and its tone is strong, so it is not as gentle as (b).

(2) indicating "indirect orders" or "wishes".

The verb object in this sentence is a third-person noun or pronoun.

For example:

Put Robert in charge of the marketing department.

Let her join our choir.

(3) indicating "warning", "contempt" and "threat"