I want to understand the use of English grammar and what grammar is in English

English grammar is a set of linguistic rules summarized for the English language. One refers to the structural law itself, that is, the grammatical facts that are commonly spoken; The other refers to grammar, which is the science of studying, describing, and explaining the laws of grammatical structure, and the understanding and explanation of the objectively existing grammatical system.

1. Words. Nouns are generally divided into proper nouns and common nouns. A proper noun is the proper name of an individual, person, place, group, institution, etc., and the first letter is usually capitalized.

Pronouns are divided into personal pronouns, possessive pronouns, demonstrative pronouns, reflexive pronouns, mutual pronouns, interrogative pronouns, relative pronouns, conjunctive pronouns, and indefinite pronouns.

Numerals denote quantities or sequences, etc. It is divided into cardinal and ordinal numbers.

Verbs are divided into substantial verbs, associative verbs, auxiliary verbs, and modal verbs.

2. Tense. Tense is a verb form in which different tenses are used to indicate different times and ways. Verb tense is the form of a verb that denotes actions, actions, and states in various temporal conditions. So, when we say tense structure, we are referring to the verb form in the corresponding tense.

The so-called "time" is the period during which the behavior occurs or the period during which the state exists, i.e.:"Present, past, future, past future"Four types; The so-called "state" is the state presented when an action or state occurs, and there are four types of state: general state, continuous state, completion state, and completion progress state.

3. Voice. Active voice.

The subject is the enabling verb of the predicate action. That is to say, the action of the predicate is derived from the autonomic and imposed on the object. In contrast, in the passive voice, the subject is the subject of the predicate action, and if there is an object, the object is often the moving party of the predicate action.

Passive voice. The passive voice is used more often in English than in Chinese, and is often used in many textbooks, exams, and even practical applications. Generally speaking, when emphasizing the bearer of the action, it is not necessary to name the performer or the ambiguous performer, and the passive form is used.

4. Sentence components.

A sentence is generally composed of two parts, the subject part and the predicate part. The subject part is generally made up of a noun or gerund, and the predicate part is generally made up of a verb.

Sentence components are the components of a sentence that play a certain function. A sentence is made up of individual sentence components. The components of a sentence include eight types: subject, predicate, object, definite, complement, adverbial, predicative, and homonymous. Every sentence has a subject, a predicate, and an object.

Verb: A word that indicates an action or state when it is a verb. In English, there must be a verb in each sentence that acts as a predicate, stating what the subject is "what" or "what to do". Verbs have a change in pronoun, number, tense, voice, and tone.

Usage: When a sentence is in the simple past tense, the verb (including the verb be) follows the accusatory liquid (note that the verb should be changed to the past tense).

When the sentence is in the simple present tense, the verb (including the verb be) follows the subject (note that the verb changes according to the person, and when the subject is but the third person is, use the singular form).

When a sentence is in the simple future tense, the verb follows "will" or "be".

goingto

do".

Adverbs: Adverbs are delicate words that express the characteristics of actions or states in a sentence, and are used to modify verbs, adjectives, other adverbs, or whole sentences, indicating concepts such as time, place, degree, and manner.

After verbs, auxiliary verbs, modal verbs.

Nouns: The world is made up of all things, and these things have their own names, and the words that represent these names are called nouns. A noun can denote the name of a person, a thing, or an abstract concept.

Usage: A noun can be preceded by an article or other qualifier.

Nouns are nominative (as subject), genitive (as a definite, and the sock vertical indicates to belong) and accusative (as an object). In general, the nominative and accusative cases of a noun are the same, and the genitive case is usually added after it's or use the "of+ noun" structure.

Preposition: The word used to show the relationship between a noun, pronoun (or other parts of speech, phrase or clause equivalent to a noun) and other words in a sentence is called a preposition. The noun, pronoun, or equivalent to the noun after the preposition is called the prepositional object, which is built as the prepositional object.