1. I read the book in five days.

2. I read the book for five days.
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Does #1 mean he finished reading the book from the first page to the last page?

Does #2 mean that he read the book for 5 days but not finished reading the book to the last page?

3 answers

1. OK
2. OK, but he may or may not have finished reading it in those 5 days.
wate nvm i think u mite be rong... idrk y r u even askin me g0 tel ur teecher
1. yes
2. no, could've also finished it