English
posted by rfvv
1. He read the book in 5 days.
2. He read the book after 5 days.
3. He read the book within 5 days.

In a dictionary, I found that 'in' is used as 'within' in American English. Then it's confusing. Does #1 mean #3 in American English? I think #1 mean that it took 5 day for him to read this book. Am I right? In #3, He may have finished reading the book within 2 days, 3 days, 4 days or 5 days,right? Would you answer the qeustions?

Ms. Sue
Yes, 1 and 3 mean the same. 3 could mean less than 5 days.
2 means something entirely different. 
rfvv
Thank you. Then, when it took nearly 5 days to finish reading the book, what expression do we have to use?

Writeacher
"when it took nearly 5 days to finish reading the book"  Then I'd use 3.
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