Showing time
at a specific time: at 7:20, at dawn, at dinner | |
on a specific day or date: on Tuesday, on June 4 | |
in a part of a 24-hour period: in the afternoon, in the daytime [but at night] | |
in a year or month: in 2008, in July | |
in a period of time: finished in three hours |
Showing place
at a meeting place or location: at home, at the club | |
at the edge of something: sitting at the desk | |
at the corner of something: turning at the intersection | |
at a target: throwing the snowball at Lucy | |
on a surface: placed on the table, hanging on the wall | |
on a street: the house on Spring Street | |
on an electronic medium: on television, on the Internet | |
in an enclosed space: in the garage, in an envelope | |
in a geographic location: in San Diego, in Texas | |
in a print medium: in a book, in a magazine |