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Unit 9 - Exercise 1 - Present perfect: affirmative
Grammar
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Unit 1 - Exercise 1 - Present simple: affirmative and negative
Unit 1 - Exercise 2 - Present simple: interrogative
Unit 2 - Exercise 1 - have to – all forms
Unit 2 - Exercise 2 - Adverbs of frequency
Unit 3 - Exercise 1 - Present continuous (Style)
Unit 3 - Exercise 2 - Present simple and continuous (Style)
Unit 4 - Exercise 1- there is/there are; some/any
Unit 4 - Exercise 2 - some, any, much, many, a lot of, a little, a few
Unit 5 - Exercise 1 - Comparative adjectives
Unit 5 - Exercise 2 - Superlative adjectives
Unit 6 - Exercise 1 - Past simple affirmative: regular verbs
Unit 6 - Exercise 2 - Past simple: be and can
Unit 7 - Exercise 1 - Past simple affirmative: irregular verbs
Unit 7 - Exercise 2 - Past simple negative and interrogative
Unit 8 - Exercise 1 - going to
Unit 8 - Exercise 2 - will
Unit 9 - Exercise 1 - Present perfect: affirmative
Unit 9 - Exercise 2 - Present perfect: negative and interrogative
Unit 9 - Exercise 1 - Present perfect: affirmative
Choose the correct answer.
