When do you need an auxiliary verb

At the time of the interrogative sentence, I show action.

In the present tense, affirmative sentences become general interrogative sentences, usually find be verbs or modal verbs, and bring them to the beginning of the sentence, for example: 1 he is a student.

It becomes is he a student? 2. lily can speak english.

Can lily speak english?

A negative sentence is to add not. after the verb be and the modal verbFor example:

1. he isn’t a student. 2. lily can’t speak english.

However, if there are no be verbs and modal verbs in the sentence, then use auxiliary verbs to help with doubts and negations. In the simple present tense, the auxiliary verb is do does. An interrogative sentence is to bring the auxiliary verb to the beginning of the sentence, in which the subject is used in the singular third person with does, and the other people with do

For example:1 lily speaks english well.

It becomes: dose lily speak english well?：yes, she does.

no, they don’t.

A negative sentence is to add not. after the auxiliary verb do doseAs with the general interrogative sentence, the subject is used in the singular third person with does, and the other with doFor example:

1. lily doesn’t speak english well. 2.

When in an English sentence, there is no be (am, is, are, was, were), auxiliary verb orModal verbsWhen, or rather: whenSubstantive verbsWhen acting as a predicate.

When the predicate in a sentence is a verb with a real meaning (a verb with practical meaning, that is, it is often said that eating, drinking, lazing, sleeping 1Interrogative sentences.

, a predicate verb.

When it is an action verb, the auxiliary verbs do and does (third person singular) must be added.

There is a certain meaning of the word.

There is a certain meaning of the word, but it is not complete, and it must form a predicate together with the verb form. In interrogative sentences with a euphemistic tone led by could, it is often used to express a request for help from others or a request for an elder. (In making a negative, be careful.)

When rejecting an elder's request, you can't use can not, which seems too blunt and impolite. However, it is possible to use can not when the elder rejects the request of the junior. )

The above content reference: Encyclopedia - modal verbs.

When the predicate in a sentence is a substantial verb (a verb with practical meaning, that is, what we often call eating, drinking, lazing, sleepingIn an interrogative sentence, when the predicate verb is an action verb, the auxiliary verbs do and do (third person singular) must be added.

1.For general interrogative sentences of substantial verbs, doeg. should be preceded by special interrogative sentences she gets up late. does she get up late?

he likes her. who does he like?

2.Emphasis on verbs.

eg. lisa did well in her test. lisa did do well in her test.(The first do in this sentence is an emphatic role, and there is no real meaning).

1. Do and does, as substantive verbs or action verbs, both mean "do", both are in the simple present tense, the subject is the third person singular with does, and the rest of the people use do.

2. Do and does, as auxiliary verbs, have no meaning and constitute interrogative sentences, the subject is the third person singular with does, the rest of the personal with do, and the following verbs are all in the original form.

For example: they do my homework every day(do is a substantive verb).

They do their homework every day.

The usage of do, does is as follows:

1. Usage of do:

It is used to form the questioning or negative tense in the simple present tense and the simple past tense, followed by the original verb. In the interrogation, do is grammatically needed, but customarily can be omitted, especially in colloquial language.

When there are negative adverbs such as never, seldom, hardly, scarcely, little, etc., these adverbs can be moved to the beginning of the sentence to strengthen the tone, and they can be placed before do to express emphasis, which is one of the inverted structures.

2. Usage of DOES:

It is used to express the actions that have been done or mentioned before the same subject, and the objects and adverbs involved in the verb can also be used as does, and when used as transitive verbs, nouns, pronouns, gerunds, and clauses can be used as objects, and double objects can also be used (the indirect object can be transformed into the object of the preposition to).

Auxiliary verb role:

a.Indicates the tense, e.g. he is singingHe's singing.

b.Indicates the voice, e.g. he was sent to EnglandHe was sent to England.

c.Form a question, e.g. "do you like college life?".Do you enjoy college life?

d.It is used in conjunction with the negative adverb not to form a negative sentence, e.g. i don't like him.I don't like him.

As a verb in the substantive sense of the action verb, both mean "do", both are in the simple present tense, the subject is the third person singular with does, and the rest of the person with do; As an auxiliary verb, it has no meaning and constitutes an interrogative sentence, the subject is the third person singular with does, the rest of the person with do, and the following verbs are all in the original form. Such as:

i/we/they do my homework every day.(do is a substantive verb).

I we do their homework every day.

Do and does as auxiliary verbs have no meaning, and they form interrogative sentences and negative sentences in the simple present tense in the sentence. Do is used in sentences in the first person, second person, and third person plural forms, and does is used in sentences where the subject is third person singular.

This question can be done by he do...

1. Do can be used as an auxiliary verb, which is used in interrogative sentences when asking questions about predicate verbs in sentences, such as: i go to school everyday→do you go to school everyday?

When the subject of the action is in the third person, do becomes does. The same is true in special question sentences, such as the does in the original question.

2. In addition to being an auxiliary verb or a substantive verb, do, do, do (something); Do it (somehow); Let's go; Manifestation; (at the time of inquiry or discussion) progress, the meaning of progress. It can be used as a predicate verb in a sentence, and when it becomes a general interrogative sentence, the principle is the same as in the first article, and when the third person is the subject, it should be changed to a do question. Same as any other verb.

do： aux.Construct interrogative sentences and negative sentences; Replace the verb to bury wither; Used to strengthen the tone;

vt.Do; Dry; Carry out; In;

vi.Manifestation; Progress; Arouse; Walked;

n.social gatherings; social activities; Banquet;

Plural: dos Past tense: did Present participle: doing Past participle: done Third person singular: does

Example sentence]Why did you do that?

Why did you bend the acres and caves to do that?

what did you do?

What exactly did you do?

doesconj.do, use, work;

v.do( third person singular of do ); Dry; Learn; Study;

n.Female deer (or female rabbit, female antelope, etc.) ( plural of nouns for doe );

Example sentence: What does he mean?

What do you mean by that?

does she work here?

Does she work here?

Usage of auxiliary verbs (do, does).

1) When the sentence is an affirmative sentence, it does not involve the use of auxiliary verbs, but only the principle of "subject-verb agreement".

2) When the sentence is a negative sentence, it is necessary to decide to use the corresponding auxiliary verb according to the personal pronoun of the subject: when the subject is "three singles", do should be used; When the subject is "non-three singles", the auxiliary verb is used in its original form.

3) When a sentence becomes an interrogative sentence, it is also necessary to decide to use do or does at the beginning of the sentence according to the subject of the sentence

In the present tense, do and does are used, such as always, usually, often, every day(year), ......

The first person, second person, and noun plural are used as do (i, you, we, they, cats, dogs, s, etc.).

The third person and noun singular are used in the do (he, she, it, cat, dog, etc.).

Example sentence: i do the homework

he does the homework.

耐蚂 do subject, first person, does, subject, third person.

is a be verb and do is an auxiliary verb. The difference between be and do is: different meanings, different usages, and different focuses.

First, the meaning is different.

1. be: Yes, exists, is located.

2. do: do, do, do (something hidden stool Li), (in some way) do.

Second, the usage is different.

1. be: be verb, there are many meanings and usages, the general meaning is: yes, this usage, there are many variations of crude pins, is, am, are, was, were, being, been, to be

In addition, the verb be also has the meaning of becoming. According to the different person, number, time and form in the sentence, the corresponding be verb should be chosen.

2. do: do is an English word, pronounced [du], with a variety of parts of speech and meanings. Construct interrogative sentences and negative sentences;

In place of verbs. Used to strengthen the tone; It has the meaning of doing, doing, doing, performing, and so on.

It is used to form a general interrogative sentence, to form a negative imperative sentence, and is placed before the original form of the verb to strengthen the tone of the verb.

Third, the focus is different.

1. be: change to is, am, are or retain the prototype be according to the tense voice.

2. do: do is an auxiliary verb used in the simple present tense, and did is an auxiliary verb used in the simple past tense. Third person does.

1. Constitute a general interrogative sentence;

2. Do and not are combined to form a negative sentence;

3. Constitute a negative imperative sentence;

4. Put it before the original form of the verb to strengthen the tone of the verb;

5. It is used for inverted sentences;

6. It is used as a pronoun to refer to the action already mentioned.

1. All auxiliary verbs do does; Noun plural (do).

Note: do is used in the first person and noun plural, and do is used in the third person singular and noun singular or uncountable nouns.