Table of contents: Unit 1. Gerunds and infinitives; Unit 2. Auxiliary verbs; Unit 3. Subject-verb agreement; Unit 4. Verb form and tenses; Unit 5. Participial forms; Unit 6. Comparatives and superlatives; Unit 7. Negation; Unit 8. Pronouns and determiners; Unit 9. Nouns and articles; Unit 10. Relative clause; Unit 11. Conjunctions and prepositions; Unit 12. Conditionals; Unit 13. Other possible questions; Unit 14. Review.
