『GRAMMAR IN FOCUS. 3』는 영어 기본문법 3단계 시리즈의 세번째 책으로, 말하고 쓰면서 영어 문법을 쉽게 이해할 수 있도록 돕는다.

Unit 01. Parts of a Sentence
Unit 02. Parts of Speech
Unit 03. Nouns, Articles
Unit 04. Pronouns
Unit 05. Indefinite Pronouns
Unit 06. Quantifiers
Unit 07. Comparatives & Superlatives
Unit 08. Participial Adjectives
Unit 09. Simple Present vs. Simple Past of the Verb Be
Unit 10. Simple Present vs. Simple Past
Unit 11. Present Progressive vs. Past Progressive
Unit 12. Simple Present vs. Present Progressive
Unit 13. Future: Will vs. Be going to
Unit 14. Present Perfect
Unit 15. Present Perfect vs. Simple Past
Unit 16. The Passive
Unit 17. Helping Verbs: Can, Must, Have to
Unit 18. Helping Verbs: Can/May, Would/Could
Unit 19. Gerunds vs. Infinitives
Unit 20. Conjunctions: And, But, Or, Because, So