Unit 1 Getting to Know Each Other
Grammar Tip 1: Present Perfect (현재완료)
Grammar Tip 2: Comparison (비교구문)

Unit 2 Writing about Myself
Grammar Tip 1: Subordinate Conjunctions (종속접속사)
Grammar Tip 2: Present Progressive (현재진행)

Unit 3 Invitation
Grammar Tip 1: Modal Auxiliary (법조동사)
Grammar Tip 2: To-Infinitive (to부정사)

Unit 4 My Home
Grammar Tip 1: Prepositions of Location (장소를 나타내는 전치사)
Grammar Tip 2: Past Tense (과거시제)

Unit 5 Leisure Activity
Grammar Tip 1: Verb + To-Infinitive/ ~ing (동사 + to부정사/ ~ing)
Grammar Tip 2: Question Word + To-Infinitive (의문사 + to부정사)

Unit 6 Getting Around
Grammar Tip 1: Indirect Questions (간접의문문)
Grammar Tip 2: Conditional Clause (조건절)

Unit 7 My Opinion
Grammar Tip 1: Superlatives (최상급)
Grammar Tip 2: Subjunctive Past (가정법과거)

Unit 8 Let's Go Shopping
Grammar Tip 1: Countable nouns / Uncountable nouns (셀 수 있는 명사/ 셀 수 없는 명사)
Grammar Tip 2: Adjectives and Adverbs (형용사와 부사)

Unit 9 Every Day
Grammar Tip 1: keep / make + O + OC (keep/make + 목적어 + 목적보어)
Grammar Tip 2: Prepositions of Time (시간을 나타내는 전치사)

Unit 10 Taking a Trip
Grammar Tip 1: Relative Adverbs (관계부사)
Grammar Tip 2: It ~ to-infinitive (가주어 it ~ to부정사)

Unit 11 Healthy Life
Grammar Tip 1: Relative Pronoun 'what' (관계대명사 what)
Grammar Tip 2: Let + O + verb (let + 목적어 + 동사)

Unit 12 Job Interview
Grammar Tip 1: Passives (수동태)
Grammar Tip 2: Passives without 'by' (by를 쓰지 않는 수동태)

Unit 13 Computer
Grammar Tip 1: Be supposed to / Get + p.p. (be supposed to / get + 과거분사)
Grammar Tip 2: Whenever, Wherever, However (복합관계부사)

Anser Keys & Translation