unit 01 Tenses / 1
Focus 1 Simple tense (단순시제) / 5
Focus 2 Progressive (진행형) / 9
Focus 3 Perfect (완료형) / 12

unit 02 Sentence Structure / 25
Focus 1 Kinds of verbs (동사의 종류) / 30
Focus 2 Confusing verbs (혼동하기 쉬운 동사) / 32
Focus 3 Sentence patterns (문장 형식) / 34

unit 03 Infinitive and Gerund / 49
Focus 1 to-Infinitive (to부정사) / 54
Focus 2 Gerund (동명사) / 57
Focus 3 Verb + to-infinitive / verb + ~ing / 59

unit 04 Auxiliary Verbs / 73
Focus 1 can/could, may/might, will/would / 77
Focus 2 shall/should, must / 82
Focus 3 need/dare, used to, do / 85

unit 05 Participle / 101
Focus 1 Present and past participle (현재분사와 과거분사) / 105
Focus 2 Participle construction (분사구문) (1) / 109
Focus 3 Participle construction (분사구문) (2) / 112

unit 06 Adjectives and Adverbs / 125
Focus 1 Adjectives (형용사) / 130
Focus 2 Comparison (비교) / 134
Focus 3 Adverbs (부사) / 140

unit 07 Pronouns & Review / 157
Focus 1 Personal pronoun (인칭대명사) / 160
Focus 2 It, Demonstrative pronoun (It, 지시대명사) / 164
Focus 3 Indefinite pronoun, interrogative pronoun (부정대명사, 의문대명사) / 168

Review 1-7 / 177

unit 08 Relatives / 191
Focus 1 Relative pronouns (관계대명사) / 195
Focus 2 Restrictive and Nonrestrictive usage / Ellipsis of relative pronouns / Quasi-relative pronouns (제한적 용법과 비제한적 용법 / 관계대명사의 생략 / 유사관계대명사) / 199
Focus 3 Relative adverbs (관계부사) / 203

unit 09 The Passive Voice / 217
Focus 1 The Active vs. Passive Voice (능동태와 수동태) / 221
Focus 2 Usages of the passive voice (수동태 용법) / 224
Focus 3 Passives without ‘by’ (by를 쓰지 않는 수동태) / 230

unit 10 Subjunctive Mood / 247
Focus 1 Subjunctive past and subjunctive past perfect (가정법 과거와 가정법 과거완료) / 251
Focus 2 Subjunctive Future and Ellipsis of ‘if’ (가정법 미래와 ‘if’의 생략) / 255
Focus 3 Other Structures for Subjunctive Mood (가정법의 다른 구문) / 258

unit 11 Prepositions / 273
Focus 1 Prepositions- time, place, direction (시간, 장소, 방향 전치사) / 277
Focus 2 Prepositions- theme, cause, job, etc. (주제, 원인, 직업, 수단, 양보, 예외, 재료, 대가를 나타내는 전치사) / 284
Focus 3 Usage of prepositions (전치사의 용법) / 288

unit 12 Conjunctions / 307
Focus 1 Kinds of Conjunctions and Coordinate Conjunction (접속사 종류와 등위 접속사) / 311
Focus 2 Subordinate conjunction I (종속접속사 - that, whether, if when, while, as, before, after, etc.) / 317
Focus 3 Subordinate conjunction II (종속접속사 - because, since, as; if, unless; so that; so~that; though, although, even if) / 321

unit 13 Agreement and Narration / 341
Focus 1 Agreement of subjects and verbs (주어와 동사의 일치) / 347
Focus 2 Agreement of tense (시제의 일치) / 353
Focus 3 Narration (화법) / 356

Review 8-13 / 364

부록-정답 / 379