Native EnglishNatural Grammar
ByPrepositionIndicates:A position
Time:  On or before a certain time
A means or execution Position:The restaurant is by the hotel.They drove by the house.Time:You must be home by 11:00pm.By the time we get there . . .Means:Ex:  It was written by Robert FrostIt was painted by hand.Grammar Patterns
ByPrepositionIndicates:A position
Time:  On or before a certain time

By