Grammar

Fast modifies the verb ran by telling us how he ran. Adverbs modify verbs, adjectives, or other adverbs. Fast describes the manner or speed of the action ran.

'Ran' is the past tense of the verb 'run', which describes an action. In the sentence 'He ran slowly', 'ran' tells us what He did - it shows action. The word 'slowly' is an adverb that describes how he ran, but 'ran' itself is the action verb.

'This' is functioning as a demonstrative adjective in this sentence because it modifies the noun 'class'. Demonstrative adjectives (this, that, these, those) point out specific nouns and help identify which one we're talking about. It tells us exactly which class is being referred to.

'Good' is an adjective because it describes the noun 'friends'. Adjectives answer the question 'what kind' - what kind of friends? Good friends. The word 'good' gives us more information about the quality of the friendship, which is the job of an adjective.

'Clever' is an adjective because it describes the noun 'boy'. Adjectives modify nouns by providing more information about their qualities or characteristics. Here, 'clever' tells us what kind of boy Harish is - an intelligent one.

'Give' is a verb because it expresses an action - the act of giving something to someone. This is in the imperative mood, which is used for commands or requests. Verbs are action words that tell what someone or something does.

'Beautiful' is an adjective because it describes the noun 'clothes'. Adjectives modify nouns by telling us more about their qualities, appearance, or characteristics. Here, 'beautiful' describes the visual quality of the clothes being requested.

'Late' is an adverb in this sentence because it modifies the verb 'came' by telling us when the action happened. Adverbs can describe when, where, how, or to what extent an action occurs. Time adverbs like 'late', 'early', 'now', and 'then' all tell us about the timing of actions.

Here the word 'down' qualifies to the train, which is a noun. And anything that tells about a noun is an adjective.

The word 'either' here qualifies to the noun (bat), and anything that qualifies a noun is an adjective.

This is an idiomatic usage, where 'down' is treated as a noun.

'Ups and downs' here means noun.

Here the word 'either' substitutes the subjects (or nouns), and anything that replaces a noun is a pronoun.

Here the word 'you' is used as a replacement for the person (or noun) who is the doer of the work. And any word that substitutes a noun is a pronoun.

Here the word 'are' is a verb of being as it mentions about the nature of a noun.