A complete reference for every grammar form used in GoVocabulary sentences — from basic tenses to passive voice.
Every sentence uses color coding so you can instantly identify each part of the sentence.
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? |
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.
| # | 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. |
| # | 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. |
| # | 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. |
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. |
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.
| 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. |
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.
| 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. |