What Is The Difference Between "In" And "By"?

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Hurry up, we have go out in/by five minutes.

Which one is grammatically correct and why?

Thanks
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faisalkhanWhich one is grammatically correct and why?
in five minutes is correct. 'in' is used for periods of time. 'by' is used for points in time.

We have to leave in five minutes.
We have to leave by 4 o'clock.

CJ
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What about in September or by September?
faisalkhanin September
on any day in the month of September
faisalkhanby September
before September arrives

CJ
For example,

We have to do it by/in September.
We have to do it by/in September 22.

Is "in" replaceable by "within" ?
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faisalkhanWe have to do it by/in September.We have to do it by/on September 22.
It's "on {a day}" and "in {a month}". on Monday, on September 30, on May 1, on Friday; in May, in June, in November. In the first sentence 'in' and 'within' are both possible with the same meaning.

CJ
how about the place. how can we use in and by for the place
anonymous place

in the box; in the house; in the bank; in the post office; in the garage

by the table; by the fence; by the car; by the river; by the farm

in = inside (an enclosure)
by = near

CJ

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faisalkhan Hurry up, we have go out in/by five minutes.
Which one is grammatically correct and why?
Thanks
In
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