What are the 4 main parts of speech?

The section of speech? Probably you are referring to the parts of speech, which are NOUN, PRONOUN, VERB, ADVERB, ADJECTIVE, PREPOSITION, CONJUNCTION, and INTERJECTION. NOUNS are Words that describe a person, place, or thing (things don't have to be material-- they can be ideas and thoughts). There are many kinds of nouns, such as gerunds, numerals, proper nouns, etc. PRONOUNS are Words known as noun substitutes. Instead of specifying the noun, one can refer to substitute Words, including he, she, it, they, and so forth. Pronouns can be singular or plural. VERB is a Word that describes action. Verbs can be transitive or intransitive. Transitive verbs are more active verbs such as buy, clean, yell, etc.; while intransitive verbs are more passive, such as think, suppose, imagine, feel ADVERB is a Word that modifies a verb, normally by describing it. Think of the adverb as the answer to how a verb is described. For example, "He did it fast!" or "She did it quickly." Most adverbs end in "ly," but as you can see, not always. CONJUNCTION is Words, phrases and clauses that connect other Words or parts of speech. An example would be AND, OR, NEITHER, EITHER, NOR, etc. PREPOSITION is a part of speech that describes location, such as UP, DOWN, UNDER, OVER, etc. ADJECTIVE is a part of speech that modifies a noun, basically as an adverb would modify a verb, by describing the noun. Examples of adjectives are COLD, HOT, STICKY, WARM, SLIPPERY, WET, etc. Finally there is the INTERJECTION, a Word to express emotions, usually follwed by an exclamation point or sometimes by a comma. Examples of interjections include OUCH, DARN, YAW, OOPS, HEY, etc.