Basic Grammar Concepts
A1 · BeginnerGrammar BasicsEvery sentence is built from a few core pieces — subject, verb, sometimes an object, and either a phrase or a clause holding it together. Learn to spot them, and grammar from here on makes a lot more sense.
What you'll learn
- What actually makes a group of words a complete sentence
- How to spot the subject and the verb in any sentence
- When a sentence needs an object — and when it doesn't
- The difference between a phrase and a clause
What makes a sentence a sentence
A sentence is a group of words that expresses a complete thought — something a listener can understand fully on its own, without needing more information. At minimum, an English sentence needs a subject (who or what it's about) and a verb (what's happening). Add a capital letter at the start and a period, question mark or exclamation point at the end, and you have a complete sentence.
Not every group of words that looks sentence-like actually is one. "Closed for lunch." reads fine as a sign, but as a piece of writing it's missing its subject and verb — it's a fragment, not a full sentence. Recognizing the difference is what this lesson is really about: seeing the pieces a sentence is built from, not memorizing labels.
Subject and verb: the two parts every sentence needs
The subject is who or what the sentence is about — usually the person or thing doing the action, or the one being described: "My manager called a meeting." "The kitchen is clean." The verb tells you what's happening — an action ("called"), a state ("is"), or a situation. Every complete English sentence needs both.
A subject can be a single word ("She left.") or a longer phrase ("My upstairs neighbor left.") — either way, it's still doing the same job: answering who or what.
Object: when the verb needs something to act on
Some verbs need an object — something that receives the action: "He wrote a long email." Here, email is what got written. Other verbs don't take an object at all: "The baby slept." There's nothing being slept — the sentence is already complete without one.
Not knowing in advance whether a verb needs an object usually isn't a problem in practice: if a sentence sounds incomplete without something after the verb ("She fixed—" fixed what?), it probably needs an object; if it already sounds finished ("She smiled."), it doesn't.
Phrase or clause? Two different building blocks
A phrase is a group of words that works together but doesn't have its own subject and verb: "the tall building," "very carefully," "before breakfast." A clause does have a subject and a verb — "because it was raining" has a subject (it) and a verb (was raining) — but not every clause can stand alone as a complete sentence. "Because it was raining" sounds unfinished on its own; it needs a main clause attached: "Because it was raining, we stayed inside."
You don't need to memorize every grammar term here. What's useful is noticing the difference: a phrase never has its own subject+verb pair; a clause does, but only some clauses can stand alone.
Real English
Watch out
English needs an explicit subject even when it's obvious from context.
This clause has a subject and a verb, but it can't stand alone — it needs a main clause attached.
State the subject once — don't repeat it with a pronoun right after.
"Very happy today" is only a phrase — the sentence needs a verb (is) to be complete.
Real life — Leaving a note for a roommate
"Took the trash out. Ordered more coffee — should arrive Friday."
"Thanks! I'll grab the mail when I get home."
Practice
Exercise 1 · Identify the subject
In "My neighbor fixed the fence yesterday," what is the subject?
Exercise 2 · Identify the verb
In "The kids are watching a movie," what is the verb?
Exercise 3 · Identify the object
In "He wrote a long email," what is the object?
Exercise 4 · Notice the pattern
Which sentence has no object?
Exercise 5 · Phrase or clause?
Is "in the kitchen" a phrase or a clause?
Exercise 6 · Phrase or clause?
Is "because she was late" a phrase or a clause?
Exercise 7 · Sort into groups
0 / 6 sorted
Exercise 8 · Build the sentence
Exercise 9 · Build the sentence
Exercise 10 · Complete the sentence
Complete with the correct subject: "Maria is busy today. ___ has three meetings." (one word)
Exercise 11 · Complete the sentence
Complete with the missing verb: "The sun ___ in the east every morning." (one word)
Exercise 12 · Fix the mistake
Fix the mistake and type the correct sentence: "The kitchen very clean today."
Exercise 13 · Fix the mistake
Fix the mistake and type the correct sentence: "My sister she called me last night."
Exercise 14 · Real-life scenario
You're writing a note at work. Which version is a complete sentence?
Quick challenge
Five mixed questions to check what stuck.
Question 1 / 5
Score: 0/0
In "The dog chased the ball," what is the object?
You learned
- A sentence expresses a complete thought and needs at least a subject and a verb.
- The subject is who or what the sentence is about; the verb is what's happening.
- Some verbs need an object to complete their meaning; many don't.
- A phrase never has its own subject+verb pair; a clause does, but not every clause can stand alone.
Related grammar lessons
Parts of Speech
Learn to recognize noun, pronoun, verb, adjective, adverb, determiner/article, preposition and conjunction in real English sentences — practically, not as a list to memorize.
Subject–Verb Agreement
Learn to match the verb to its subject in the present simple — I/you/we/they with the plain verb, he/she/it with -s, the forms of be, and do/does — and avoid the most common agreement mistakes.
Word Order Basics
Learn the default English sentence pattern — subject, then verb, then object — and where time, place and frequency words go.
Have and Has
Learn when to use have and when to use has — for I/you/we/they versus he/she/it — plus how to ask questions and make negatives with do/does, and avoid the most common mistakes.