English Grammar Guide

A complete reference for every grammar form used in GoVocabulary sentences — from basic tenses to passive voice.

🎨 How to Read GoVocabulary Sentences

Every sentence uses color coding so you can instantly identify each part of the sentence.

🔵 Subject
The person or thing doing the action — She, The nation, His idea
🟠 Verb
The action or state — runs, is running, has run, will run
🟣 Target Word
The vocabulary word you are learning today — highlighted in every sentence
The nation declared its sovereignty.
↑ Blue = Subject  |  Orange = Verb  |  Purple = Target Word
🏷️ Sentence Types — What Each Badge Means

Each sentence has a badge that tells you what type of sentence it is. Every tense has 4 sentence types — Positive, Negative, Interrogative, and WH Question.

Badge Meaning Structure Example
✔ Positive A normal affirmative statement — something IS happening Subject + verb + object He defends sovereignty.
✖ Negative A statement with "not" — something is NOT happening Subject + do/does/did + not + verb He does not defend sovereignty.
? Interrogative A Yes/No question — answer is yes or no Do/Does/Did + subject + verb? Does he defend sovereignty?
WH Question Starts with Who, What, Why, How, When, Where — needs a detailed answer WH word + do/does/did + subject + verb? Why does he defend sovereignty?
💡 Quick Tip
Every single tense in English follows this same 4-type pattern. Once you learn the formula for one tense, you can make all 4 sentence types. That is why GoVocabulary shows you all 4 for every tense!
📅 The 12 English Tenses

English has 3 time periods — Present, Past, Future. Each has 4 forms: Simple, Continuous, Perfect, Perfect Continuous.
3 × 4 = 12 tenses total. Every tense tells us when and how an action happens.

Simple
A basic action — states a fact or habit
He runs every day.
Continuous
An ongoing action — happening at a specific time
He is running now.
Perfect
A completed action — finished before a reference point
He has run 5km.
Perfect Continuous
Started earlier, still ongoing — emphasizes duration
He has been running for 2 hours.
🟢 Present Tenses
# Tense Formula When to use Example
1 Present Simple Subject + V1 (add s/es for he/she/it) Habits, routines, facts, general truths Nations protect their sovereignty. He defends the border.
2 Present Continuous Subject + is/am/are + V-ing Happening right now or a temporary ongoing action The army is defending the border right now.
3 Present Perfect Subject + has/have + V3 Completed before now — still connected to the present The nation has declared its sovereignty.
4 Present Perfect Continuous Subject + has/have + been + V-ing Started in the past, still continuing — focuses on duration They have been fighting for sovereignty for 50 years.
🔵 Past Tenses
# Tense Formula When to use Example
5 Past Simple Subject + V2 (past form) A completed action at a specific time in the past The nation declared sovereignty in 1947.
6 Past Continuous Subject + was/were + V-ing An ongoing action at a specific past time — was in progress The leaders were negotiating when war broke out.
7 Past Perfect Subject + had + V3 Completed BEFORE another past action — the "earlier" past The country had lost sovereignty before the treaty was signed.
8 Past Perfect Continuous Subject + had + been + V-ing Ongoing for a period BEFORE another past event They had been fighting for decades before peace came.
🟡 Future Tenses
# Tense Formula When to use Example
9 Future Simple Subject + will + V1 A decision, prediction, or promise about the future The army will protect our sovereignty.
10 Future Continuous Subject + will + be + V-ing Will be in progress at a specific future time At 9pm, they will be discussing sovereignty.
11 Future Perfect Subject + will + have + V3 Will be completed BEFORE a specific future time By 2030, they will have regained their sovereignty.
12 Future Perfect Continuous Subject + will + have + been + V-ing Will have been ongoing for a duration by a future point By 2050, they will have been defending sovereignty for 100 years.
📖 Verb Forms — V1, V2, V3, V-ing
V1 = base form → run, write, protect, declare
V2 = past simple form → ran, wrote, protected, declared
V3 = past participle → run, written, protected, declared
V-ing = present participle → running, writing, protecting, declaring
🔀 Conditional Sentences — 4 Types

Conditionals are "if-then" sentences. They show a condition and its result. The 4 types differ by how real, possible, or imaginary the situation is.

Type Reality Formula Example
Zero
Always True
Universal truth — always happens, like a law of nature If + Present Simple, + Present Simple If a country loses sovereignty, it loses its freedom.
First
Possible
Real and likely future — this could actually happen If + Present Simple, will + V1 If we protect our sovereignty, we will prosper.
Second
Imaginary
Unreal or unlikely now — just imagining a situation If + Past Simple, would + V1 If every nation respected sovereignty, wars would not exist.
Third
Past Regret
Did NOT happen in the past — imagining a different result If + Past Perfect, would have + V3 If they had protected sovereignty, the invasion would not have happened.
💡 Key Rule — Tense Shift in Conditionals
The verb tenses in conditionals shift back one step to show how real or imaginary the situation is:
Zero: Present + Present  |  First: Present + will  |  Second: Past + would  |  Third: Past Perfect + would have
🎯 Modal Verbs

Modal verbs are special helper verbs. They come before the main verb and add meaning about possibility, ability, permission, or obligation. They never change form — no -s, no -ed, no -ing added.

Formula: Subject + modal verb + V1 (base verb, no changes)
He can protect sovereignty.  |  They must respect the law.  |  She should defend her rights.
Modal Type Meaning Example
Can Ability Someone has the ability or it is possible to do something A strong army can protect sovereignty.
Could Past ability / Possibility Past ability OR a polite, less certain possibility The treaty could guarantee sovereignty.
May Possibility / Permission A real possibility OR formal permission (more formal than "can") Small nations may reclaim their sovereignty.
Might Weak possibility A smaller chance — less certain than "may" The alliance might strengthen their sovereignty.
Should Advice / Expectation What is the right or expected thing to do — advice or recommendation Every country should respect the sovereignty of others.
Must Obligation / Certainty Strong obligation (have to do it) OR strong certainty (definitely true) Nations must not violate each other's sovereignty.
Would Hypothetical / Polite Imaginary situations (used in 2nd & 3rd conditionals) OR polite requests A united nation would always defend its sovereignty.
Shall Formal future / Promise Formal strong promise or determination — mainly used with I / We We shall never surrender our sovereignty.
⚠️ Important — Modal Negative
Add not after the modal to make it negative:
cannot / can't  |  could not / couldn't  |  should not / shouldn't  |  must not / mustn't  |  will not / won't

Note: "must not" = forbidden (you are NOT allowed)  |  "do not have to" = not necessary (you can choose)
🔁 Passive Voice

In active voice, the subject does the action. In passive voice, the action is done TO the subject — the doer becomes less important or unknown. Use passive when you want to focus on WHAT happened, not WHO did it.

Active The UN recognized their sovereignty.
Passive Their sovereignty was recognized by the UN.
Passive Formula: Subject + be (in the correct tense) + V3 (past participle)
Tense Passive Formula Example
Present Simple is/are + V3 Sovereignty is respected by all nations.
Present Continuous is/are + being + V3 Sovereignty is being discussed at the UN.
Present Perfect has/have + been + V3 Sovereignty has been recognized by all members.
Past Simple was/were + V3 Sovereignty was violated during the war.
Past Continuous was/were + being + V3 Sovereignty was being debated in parliament.
Past Perfect had + been + V3 Sovereignty had been established before independence.
Future Simple will + be + V3 Sovereignty will be protected under the new charter.
Future Perfect will + have + been + V3 Sovereignty will have been restored by 2030.
💡 When to use Passive Voice?
✅ Doer is unknown: The border was attacked. (we don't know who)
✅ Doer is unimportant: The law was passed in 1990.
✅ Focus on the action or result: Sovereignty was restored.
❌ Do NOT use passive when the doer is important and known — use active voice instead.
✅ Ready to practice? Go back to today's word!
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