English Grammar Fundamentals

Structure of Complete Sentences

A complete sentence requires both a subject and a verb. Every complete sentence must conclude with appropriate punctuation, specifically a period, question mark, or exclamation point (., ?, or !).

Subject-Verb Agreement Rules

Subject-verb agreement dictates how a verb form changes based on the grammatical number of its subject. Singular subjects take a verb form ending in s. Conversely, plural subjects take a verb form with no s at the end.

Pronoun Categories and Functions

Pronouns are categorized by their grammatical role within a sentence. Subject pronouns perform the action of a sentence and include I, you, he, she, it, we, and they.

Object pronouns receive the action of a verb or preposition and include me, you, him, her, it, us, and them.

Possessive adjectives modify nouns to express ownership and include my, your, his, her, its, our, and their.

Possessive pronouns replace noun phrases to show ownership directly and include mine, yours, his, hers, ours, and theirs.

Progressive Tenses

Progressive tenses describe ongoing or continuous actions. They are formed using a conjugated form of the auxiliary verb Be combined with a main verb ending in -ing (Be + verb ing).

Modal Auxiliary Verbs

Modal auxiliary verbs express conditions such as necessity, permission, possibility, ability, or intention. The complete set of modal verbs includes can, could, may, might, must, shall, should, will, and would.

Adjectives and Adverbs

Adjectives and adverbs perform distinct modifying functions in English syntax. An adjective describes a noun, as demonstrated in the phrase "a fast car."

An adverb describes a verb, an adjective, or another adverb, as demonstrated in the sentence "He drove fast." Adverbs usually end with the suffix -ly.

Participial Phrases

A participial phrase begins with an -ing present participle verb or an -ed past participle verb. It functions as an adjective that describes a noun in the sentence. For example, in the sentence "Barking loudly, the dog chased the cat," the phrase "Barking loudly" starts with an -ing verb and acts as an adjective describing the noun "the dog."

Primary Verb Tenses and Perfect Tense Formations

Primary verb tenses indicate the time frame of an action. The past tense indicates an action that happened before, exemplified by walked. The present tense indicates an action that is happening now, exemplified by walks. The future tense indicates an action that will happen later, exemplified by will walk.

Perfect tense verbs describe completed actions relative to a point in time. They are formed by combining an auxiliary verb with a past participle, following the formula have/has/had + verb 3.