Contents - Present perfect and past

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Present perfect and past
Unit 7 Present perfect (1) (I have done)	Exercise 7
Unit 8 Present perfect (2) (I have done)	Exercise 8
Unit 9 Present perfect continuous (I have been doing)	Exercise 9
Unit 10 Present perfect continuous and simple (I have been doing and I have done)	Exercise 10
Unit 11 How long have you (been)...?	Exercise 11
Unit 12 When...? and How long...? For and since	Exercise 12
Unit 13 Present perfect and past (1) (I have done and I did)	Exercise 13
Unit 14 Present perfect and past (2) (I have done and I did)	Exercise 14
Unit 15 Past perfect (I had done)	Exercise 15
Unit 16 Past perfect continuous (I had been doing)	Exercise 16
Unit 17 Have and have got	Exercise 17
Unit 18 Used to (do)	Exercise 18

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