Grammar Explorer
Select a CEFR level to browse the topics.
A1–A2: Beginner/Elementary
Parts of Speech
Verb Tenses & Aspects
Sentence Structure
Clauses
Phrases
Non-finite Verb Forms
- Basic Infinitives
- Gerunds
Determiner System
- Articles
- Demonstratives
- Possessives
- Basic Quantifiers
Agreement & Concord
Transformations & Special Constructions
Verb-Related Topics
- Basic Phrasal Verbs
- Make vs. Do
- Say vs. Tell
Questions and Responses
- Basic Question Tags
- Short Answers
Other
- Capitalization
- Abbreviations
- Punctuation Basics
B1–B2: Intermediate/Upper Intermediate
Verb Tenses & Aspects
Conditionals
Voice
Mood & Modality
Sentence Structure
- Compound Sentences
- Complex Sentences
- SVO functional slots
Clauses
Phrases
Agreement & Concord
Comparison
- Comparative/Superlative Forms
- Parallel Structures
Reported Speech
- Statements
- Questions
- Commands
- Backshifting
Non-finite Verb Forms
- Gerunds
- Infinitives
- Participles
Verb-Related Topics
- Causative Verbs
- Verb Patterns
- Verbs of Perception
- Used To/Be Used To/Get Used To
- Would for Past Habits
- Infinitive of Purpose
Modal and Hypothetical Structures
- Modals of Deduction/Probability
- Had Better
- Would Rather/Prefer
- Be Supposed To/Allowed To
Adjectives, Adverbs, and Modifiers
- Adjective Order
- Gradable/Non-Gradable
- Adverb Positions
- Too/Enough
- So/Such
- Dangling Modifiers
Questions and Responses
- Indirect Questions
- Short Answers with Auxiliaries
Connectors and Discourse
- Basic Connectors: and/but/or/so/because
Nouns, Pronouns, and Quantifiers
- Compound Nouns
- Possessive 's vs. Of
- Indefinite Compounds
- All/Both/Either/Neither
- Much/Many/Few/Little
- Some/Any/No/None
Sentence and Structure Extensions
- Word Order
- Impersonal Constructions
- Verbs with Two Objects
Punctuation
C1–C2: Advanced/Proficient
Verb Tenses & Aspects
- Overview
- Present/Past/Future Perfect Progressive
Conditionals
Mood & Modality
Sentence Structure
- Compound-Complex Sentences
Clauses
- Overview
- Conditional/Comparative Clauses
Phrases
Transformations & Special Constructions
Reported Speech
Verb-Related Topics
- Advanced Phrasal Verbs
- Future in the Past
Modal and Hypothetical Structures
Adjectives, Adverbs, and Modifiers
- Advanced Positions
- Emphasis
Questions and Responses
- Advanced Tags
- Embedded Questions
Connectors and Discourse
- Advanced: however/although/nevertheless
Nouns, Pronouns, and Quantifiers
Sentence and Structure Extensions
- Narrative Tenses
- Sentence Errors
- Exclamatory Sentences
- Emphasis Structures
Other Miscellaneous
- Hyphens/Dashes
- Quotation Marks
- Semicolons/Colons
- Nominalization
- Participle Clauses
- Discourse Cohesion