Noun is a kind of part of speech and a kind of content word, which refers to the words that treat people, things, things, time, place, emotions, concepts and other entities or abstract things.

Nouns can form sentences independently. Pronouns can usually be used in phrases or sentences.

Nouns can be divided into proper nouns and common nouns. Proper nouns are the proper names of a person, a place or an institution, such as Peking and China. Common nouns are nouns of a class of people or things or an abstract concept, such as books and sadness.

verb

1) The word indicating the action state is called a verb.

2) According to the function of verbs in sentences, verbs can be divided into four categories.

They are: notional verbs,

Link Verb (link verb)

Auxiliary verbs (auxiliary verbs),

Modal verbs (modal verbs)

It can also be divided into transitive verbs and intransitive verbs.

Note: In some cases, some verbs are part-time.

We are having a meeting.

We are having a meeting.

He has gone to new york. He has gone to new york.

3) Verbs can be divided into two categories according to whether there is an object behind them.

They are: transitive verbs, intransitive verbs,

The abbreviation is vt. And six. Description: The same verb can sometimes be used as a transitive verb and sometimes as an intransitive verb.

She can dance and sing. She can sing and dance.

She can sing many English songs. She can sing many English songs.

4) According to whether it is limited by the number of people and subjects, it can be divided into two categories.

They are: finite verbs and non-finite verbs.

For example, she sings very well. She sings very well.

She wants to learn English well. She wants to learn English well. (Learning is not restricted by the subject she, and there is no change in word form. This is an indefinite verb.

Note: There are three kinds of indefinite verbs in English: infinitive, gerund and participle.

5) According to the forms of verbs, they can be divided into three categories.

They are: verbs of one word,

Phrasal verbs (phrasal verbs),

Verb phrase (verb phrase)

For example, English contains many phrasal verbs and verb phrases. There are many phrasal verbs and verb phrases in English.

Students should learn to look up new words in the dictionary. The students learn to look up the dictionary.

Young people should take care of the elderly. Young people should take care of the old.

6) There are five forms of verbs, namely: prototype, third person singular form, past form, past participle and present participle.

Pronouns are parts of speech that replace nouns. Most pronouns have the functions of nouns and adjectives. According to their meanings, features and functions in sentences, pronouns in English can be divided into nine categories: personal pronouns, possessive pronouns, demonstrative pronouns, reflexive pronouns, interactive pronouns, interrogative pronouns, relative pronouns, connecting pronouns and indefinite pronouns.

Adjective, abbreviated as adj. or a., is one of the main parts of speech in many languages. It is mainly used to modify nouns and express the characteristics of things. Adjectives are used to modify nouns or pronouns and express the nature, state and characteristic degree of people or things.

Adverb (abbreviated as adv) is a word used to modify verbs, adjectives, whole sentences and explain concepts such as time, place, degree and way. Adverb is a half-empty and half-real word. Adverbs can be divided into adverbs of place, adverbs of way, adverbs of degree, adverbs of question and adverbs of connection.

Conjunction is a kind of function words, which can not be used as a sentence component independently, but only as a conjunction with words, phrases and sentences. Conjunctions can be mainly divided into four categories: coordinate conjunctions, turning conjunctions, selective conjunctions and causal conjunctions.

Coordinate conjunctions are used to connect coordinate words, phrases, clauses and sentences.

Such as: and, but (but; Usually not ... but-but; However, however; Express surprise, disagreement, etc-oh, wow; Used to strengthen the tone of the repeated part of the sentence-affirmation; Used to introduce a new topic-then; Often used in negative sentences-no, if not; Used in negative sentences containing questions, questions, etc. , equivalent to that-for), or (or, or; Used in negative sentences-no; Otherwise, otherwise; That is to say, in other words, nor (used after inside-no; Used after no, not, never-no; Used at the beginning of a sentence, the sentence needs to be inverted-no), so (so, so; Therefore, therefore), there (therefore, therefore, therefore), however (but, however), however (however, however; In any case, in any case; No matter what method is used; What the hell, what the hell), because (because, because), so (therefore, so), and (not only, but also; Like ..., and both ... and (both ... and ...; Not only ... and), not only that ... but also (not only ... and), there ... or (not ... yes; Also ... or), neither ... nor (neither ... nor ...), (and) then (then) and so on.

Prepositions are function words used to express the relationship between words and sentences, and cannot be used as sentence components alone. Prepositions are usually followed by noun pronouns or other parts of speech equivalent to nouns, phrases or clauses as objects. Prepositions and their objects constitute prepositional phrases, which can be used as adverbials, predicates, complements or prepositional objects in sentences. Prepositions can be divided into prep. Positional prepositions, mode prepositions, cause prepositions and other prepositions.