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five-day; five days five-day; five days’ five days’; five-day five days; five days
would take would have taken must take could be taken
would have learnt have learnt will learn will have learnt
five hundreds five hundred of five hundreds of five hundred
would take would have taken shall take could be taken
learnt; had forgotten learnt ; have forgotten have learnt ; forgot have learnt ; have forgotten
What for What if So what How come
he was five; had learnt he was five; has learnt 
at the age of five; learnt when he was five; has
five years before five years ago for five years since five years
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