Grammar Explorer

Select a CEFR level to browse the topics.

A1–A2: Beginner/Elementary

Parts of Speech
Verb Tenses & Aspects
Sentence Structure
  • Simple Sentences
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
  • Comma Rules
  • Apostrophes

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
  • Advanced Variations
Verb-Related Topics
  • Advanced Phrasal Verbs
  • Future in the Past
Modal and Hypothetical Structures
  • Wishes/Regrets
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
  • Extensions
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