Unit 1: Present Continuous – Present Simple
Unit 2: Past Simple (Regular/Irregular Verbs) – Used to
Unit 4: Present Perfect Simple
Unit 7: Present Perfect Continuous
Unit 8: Pronouns – Both/Neither – All/None – Possessives
Unit 10: The Infinitive – Too/Enough – The “-ing form”
Unit 11: Past Perfect Simple – Past Perfect Continuous
Unit 15: Conditionals – Wishes
Unit 16: Adjectives – Adverbs – Comparisons
Unit 17: Nouns – Articles
Unit 18: Some/Any/No – A lot of/Much/Many – (A) little/(A) few
Unit 20: Prepositions – Linking Words