A noun is a part of speech and a notional word, which refers to people, things, things, time, places, 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 Beijing and China. Common nouns are nouns of a class of people or things or an abstract concept, such as books and sadness.
2. pron. ：
Pronouns are parts of speech that replace nouns. Most pronouns have the functions of nouns and adjectives. Pronouns in English can be divided into personal pronouns, possessive pronouns, demonstrative pronouns, reflexive pronouns, interactive pronouns, interrogative pronouns, relative pronouns, connecting pronouns and indefinite pronouns according to their meanings, characteristics and functions in sentences.
3. Number) num. ：
Words that mean "how much" and "which number" are called numerals. Its usage is equivalent to nouns or adjectives. Numbers are divided into cardinal number and ordinal number.
4. adjective) adjective or a.
One of the main parts of speech in many languages. A word that 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 characteristics of people or things.
5. Adverbs:
It is a word used to modify verbs, adjectives and whole sentences and explain concepts such as time, place, degree and way. Adverb is a kind of half-empty and half-real word. Adverbs can be divided into time adverbs, place adverbs, way adverbs, degree adverbs, question adverbs, connection adverbs, relationship adverbs, frequency adverbs and explanation adverbs.
6. verb (verb) v;
Verbs are words used to describe or express various actions. Basically, every complete sentence has a verb. To express the second action, you can use infinitive, gerund, equivalent connectives, subordinate connectives or add clauses.
Function words: 7. Article) Art:
Articles are function words, which cannot be used alone and have no meaning. Used before nouns to help express the meaning of nouns.
The article can be said to be the symbol of nouns, without which it cannot exist independently. The number or characteristics of the theme expressed.
Preposition) prep. ：
Preposition is a function word used to express the relationship between words and sentences, and it cannot be used as a sentence component alone in a sentence. Prepositions are usually followed by a noun pronoun or other parts of speech, phrases or clauses equivalent to nouns as objects. A preposition and its object form a prepositional phrase, which is used as an adverbial, predicative, complement or prepositional object in a sentence. Prepositions can be divided into prep. Prepositions such as locative prepositions, mode prepositions and cause prepositions.
9. conj:
Conjunction is a kind of function words, which can not be used as a sentence component independently, but only plays the role of connecting words with words, phrases with phrases, sentences with sentences. Conjunctions can be mainly divided into four categories: coordinate conjunctions, turning conjunctions, selective conjunctions and causal conjunctions.
10. Auxiliary words:
Auxiliary words are function words attached before or after words, phrases and sentences, indicating structural relations or some additional meaning. There are three kinds of auxiliary words: structural auxiliary words, tense auxiliary words and mood auxiliary words.
1 1.Interj。 ：
Exclamation is a grammatical term. Words that express exclamation, call and reply.
Third, judge words: yes and no.
Others: 1, Gerund: Gerund is an unqualified verb, which has the characteristics of both verbs and nouns. It can dominate the object and can also be modified by adverbs. Gerund changes in tense and voice.
2. Verb infinitive: Definition of infinitive: It consists of the prototype of the to+ verb. The infinitive is an indefinite verb. Non-finite verbs refer to verbs that cannot act as predicates alone in a sentence, and are divided into infinitive, gerund, present participle and past participle. "Verb infinitive" consists of verb+infinitive. The infinitive can be used as any sentence element except the predicate. In addition to the general form, the passive form of infinitive also has its perfect form and progressive form.
3. Word segmentation: [participant] a word with both verb and adjective characteristics; English verb adjectives, especially those ending in -ing or -ed, -d, -t, -en or -n, have the function of adjectives, and at the same time show various verb features, such as tense, voice, adverbial and object.