➖Prepositions often confused➖
In for Within.
✖️Don't say: I'll come back in an hour - if you mean before the end of an hour.
✔️Say: I'll come back within an hour.
"In" means after the end of, "within" means before the end of.
➖Prepositions often confused➖
.By for With.
✖️Don't say: The man shot the bird by a gun.
✔️Say: The man shot the bird with a gun.
When you want to show the means or the instrument with which the action is done use "with". "By" denotes the doer of the action: The bird was shot by the man.
Note: The following take "by" and not "with": by hand, by post, by phone, by one's watch, by the hour, by the dozen, by the meter.
