Re-write the following sentences after changing them to the tense form given in brackets.
a. Tom knew him for a long time. (Present perfect tense)
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b. He wrote a novel in two months. (Past perfect continuous tense)
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c. I saw him last five years ago. (Past perfect tense)
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d. I will be coaching the football team for ten years next March. (Future perfect continuous tense)
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e. The athletes left for Canada. (Future Simple)
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f. The delivery man has delivered the parcel. (Present simple)
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