1.4 Basic grammatical concepts and terminology

Parts of Speech and Sentence Structure

Every sentence you write or read is built from a small set of word types and structural patterns. Understanding these parts of speech and how they combine into sentences gives you the vocabulary to talk about grammar and, more importantly, to fix problems in your own writing.

Parts of Speech Identification

There are eight parts of speech in English. Each one plays a different role in a sentence.

Nouns name people, places, things, or ideas. They function as subjects or objects in sentences.

• Common nouns refer to general entities (city, dog, book)
• Proper nouns name specific entities and are always capitalized (Paris, Fido, Tuesday)
• Abstract nouns represent intangible concepts (love, freedom, justice)
• Collective nouns refer to groups as a single unit (team, flock, jury)

Verbs express actions or states of being. They form the core of every predicate.

• Action verbs show physical or mental activity (jump, think, write)
• Linking verbs connect the subject to a description or identity rather than showing action (seem, appear, is, become). In "She seems tired," seems links she to tired.
• Helping verbs (also called auxiliary verbs) assist the main verb in expressing tense or mood (have, will, could). In "She has been running," has and been are helping verbs.

Adjectives modify nouns and pronouns by providing information about qualities, quantities, or states (happy, blue, five). They appear before nouns ("the tall building") or after linking verbs ("the building is tall").

• Comparative adjectives compare two things (bigger, more intelligent)
• Superlative adjectives compare three or more things (biggest, most intelligent)

Adverbs modify verbs, adjectives, or other adverbs. They describe how, when, where, or to what extent something happens (quickly, very, soon).

• Many end in -ly, but not all. Well, fast, never, and here are all adverbs.
• Adverbs can move around in a sentence for emphasis: "Quickly, she left" vs. "She left quickly."

Pronouns replace nouns to avoid repetition (she, they, it).

• Personal pronouns refer to specific people or things (I, you, he, we)
• Possessive pronouns show ownership (mine, yours, theirs)
• Reflexive pronouns refer back to the subject (myself, himself, themselves)
• Demonstrative pronouns point to specific things (this, that, these, those)
• Indefinite pronouns refer to nonspecific people or things (anyone, something, everybody)

Prepositions show relationships between words, often indicating location, direction, or time (in, on, at, by, during). They combine with a noun or pronoun to form prepositional phrases: under the table, during the meeting, before lunch.

Conjunctions connect words, phrases, or clauses.

• Coordinating conjunctions join equal elements. There are seven, remembered by the acronym FANBOYS: for, and, nor, but, or, yet, so.
• Subordinating conjunctions introduce dependent clauses (because, although, when, if).
• Correlative conjunctions work in pairs (either...or, both...and, neither...nor).

Interjections express strong emotion or sudden feeling (Wow, Ouch, Oh no). They can stand alone or be loosely attached to a sentence, and they don't play a grammatical role the way other parts of speech do.

Phrases and Clauses

A phrase is a group of words that functions as a single unit but does not contain both a subject and a predicate.

• Noun phrase: acts as a noun (the red car, my best friend)
• Verb phrase: includes the main verb plus any helping verbs (has been sleeping, will arrive)
• Prepositional phrase: starts with a preposition (in the garden, after class)
• Adjectival phrase: modifies a noun (extremely talented, full of energy)
• Adverbial phrase: modifies a verb, adjective, or adverb (with great care, very slowly)

A clause does contain a subject and a predicate. This is the key difference between phrases and clauses.

• Independent clauses express complete thoughts and can stand alone as sentences: She loves to read.
• Dependent clauses cannot stand alone. They rely on an independent clause for meaning: because it was raining. Notice how that feels incomplete on its own.

Types of Sentences

Sentences are classified by how many and what kinds of clauses they contain.

Simple sentences contain one independent clause. They have one subject-predicate pair, though either the subject or the predicate (or both) can be compound.

• The dog barked. (single subject, single verb)
• John and Mary went to the store. (compound subject, single verb)

Compound sentences join two or more independent clauses. Each clause could stand alone as its own sentence, but they're connected because the ideas are related.

• I love coffee, but she prefers tea. (joined by a coordinating conjunction)
• I love coffee; she prefers tea. (joined by a semicolon)

Complex sentences combine one independent clause with at least one dependent clause. The dependent clause adds context or detail.

• Although it was late, we continued working. (dependent clause first, then independent)
• We continued working although it was late. (independent clause first, then dependent)

Compound-complex sentences contain two or more independent clauses and at least one dependent clause.

• When the alarm sounded, John woke up, and Mary called the fire department. (one dependent clause + two independent clauses)

These are the most structurally complex sentences you'll encounter, and they're useful for expressing layered ideas.

Grammatical Terminology Application

These are the core grammar concepts you'll need to recognize and apply.

Subject-verb agreement means the subject and verb must match in number.

• Singular subjects take singular verbs: The cat sleeps.
• Plural subjects take plural verbs: The cats sleep.

This sounds simple, but tricky cases come up. For example, collective nouns can go either way depending on context: The team is winning (acting as one unit) vs. The team are arguing among themselves (acting as individuals).

Tense indicates when an action occurs.

• Past tense describes completed actions (walked, ran)
• Present tense describes current or habitual actions (walk, run)
• Future tense describes actions that will occur (will walk, will run)
• Perfect forms show completed actions relative to another time (have walked, had run)
• Progressive forms show ongoing actions (is walking, was running)

These can combine: had been running is past perfect progressive.

Voice shows the relationship between the subject and the action.

• Active voice: the subject performs the action. The cat chased the mouse.
• Passive voice: the subject receives the action. The mouse was chased by the cat.

Active voice is usually more direct and concise. Passive voice is useful when the receiver of the action matters more than the doer, or when the doer is unknown.

Mood expresses the speaker's attitude or intention.

• Indicative mood states facts or asks questions: It is raining.
• Imperative mood gives commands or makes requests: Close the door.
• Subjunctive mood expresses hypothetical or wishful situations: If I were rich... (Note: were instead of was signals the subjunctive.)

Syntax refers to the arrangement of words and phrases to create well-formed sentences. Word order matters in English more than in many other languages because English relies on position to show meaning. "The dog bit the man" means something very different from "The man bit the dog."

Parts of a Sentence

Every sentence has a subject (who or what the sentence is about) and a predicate (what the subject does or is).

• Subject: The energetic puppy
• Predicate: chased the ball across the yard

Within the predicate, you'll often find:

• A direct object, which receives the action of the verb: The chef cooked dinner.
• An indirect object, which tells you for whom or to whom the action is done: He gave me a book.
• A complement, which completes the meaning of the subject or object: She became a doctor.

Modifiers add detail and precision. Adjectives modify nouns, adverbs modify verbs (and adjectives and other adverbs), and entire phrases or clauses can serve as modifiers: The man in the blue suit waved.

Common Sentence Patterns

Most English sentences follow one of these basic patterns:

1. Subject + Verb: Birds fly.
2. Subject + Verb + Object: Children play games.
3. Subject + Linking Verb + Complement: The weather seems nice.
4. Subject + Verb + Indirect Object + Direct Object: He gave me a book.

Recognizing these patterns helps you see the skeleton of any sentence, no matter how long or complex it gets. Even a sentence with multiple modifiers and clauses will have one of these patterns at its core.