1 By the time Denis went to school, his mother had taught him to read and count. Past Perfect Passive
2 At the age of four, Denis read The Adventures of Tom Sawyer. Past Simple.
3 Now Denis is only twelve but he has passed his school leaving exams in maths, physics and history. Present Perfect
4 He has been studying English since he was six, but it still needs improving. Present Perfect Continuous.
5 Denis believes that he will enter university at the age of 14. Future Simple. Future Simple
6 Denis boats that he will have learnt at least five languages by the time he is 20. Future Perfect Simple.
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