Grade 7 Grammar Lesson 16 Idioms
Grade 8 Grammar Lesson 21 Passive verb forms
Grade 8 Grammar Lesson 6 The present perfect tense (III)
Grade 9 Grammar Lesson 3 Word order (2): Adverbs with the verb
Grade 8 Grammar Lesson 29 Causatives: make, get and have
Grade 9 Grammar Lesson 8 Present perfect