Section outline
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Do all the exercises (from level 0 to level 5). Complete the tables and check the French translation if necessary.
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Make the correct form of the past simple or the present perfect.
From Perfect English Grammar.
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Change the verb into the correct form of the past simple or present perfect.
From Perfect English Grammar.
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Change the verb into the correct form of the past simple or present perfect.
From Perfect English Grammar.
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Read the theory, if necessary, and do the exercises at the bottom of the page.
From businessenglish.com