Unit 1: Past simple, present perfect and present perfect continuous
Unit 2: Past perfect, past perfect continuous and present perfect continuous
Unit 3: Modals and passives
Unit 5: Reporting statements and imperatives
Unit 6: Reporting questions
Unit 11: Showing how certain you are about situations
Unit 12: Second and third conditionals
Unit 13: Conditionals as if, as though, as long as, provided, provided that
Unit 14: Present simple and present perfect in future time
Unit 16: Asking for, giving and refusing permission
Unit 19: -ing/-ed adjectives
Unit 20: Using -ing forms as nouns
Unit 21: Nouns and indefinite pronouns + to-infinitive
Unit 23: Relative pronouns
Unit 24: Have/get something done
Unit 25: Verbs that are used together
Unit 27: Some/any/nobody/so/such
Unit 28: The in place names
Unit 29: Verbs + to or -ing
Unit 30: Giving short answers to questions so and neither