Lesson One The Simple Present and the Present Continuous Lesson Two The Past Indefinite and the Past Continuous Lesson Three the Present Perfect and the Present Perfect Continuous(Ⅰ) Lesson Four The Present Perfect and the Present Perfect Sontinuous(Ⅱ) Lesson Five The Past Perfect and the Past Indefinite Lesson Six Ways of Expressing Future Time Lesson Seven the Passive Voice Lesson eight The Infinitive Lesson Nine The Participle Lesson Tem The Gerund Lesson Eleven The Indirect Speech Lesson Twelve The Subjunctive Mood Key to Exercises