on is at有啥区别？

1.简单明了
2.有典型例句
好的给小币币

是用在句子中的，比方说像I played football with my firends ---Saturday afternoon.
---里是用in还是on还是at ?

at后跟具体时间 如at 11.p.m
in后跟年、月和一天中的某个部分 如in July;in 2010;in the morning
on后跟日期或星期 如on Monday;on 10 June

应该是I played football with my frinds on Saturday afternoon.

附：in on at的短语集锦

in

in 1999
in 20 century
in a flash(瞬时)
in a lucky hour(在幸运时刻)
in a minute
in a second
in a short time
in a while
in a wink(一瞬间)
in advance(预先)
in an emergency(在紧急地时候)
in an evil hour(在不幸地时刻)
in an instant
in ancient times
in broad day(在大白天)
in course of (在…期间)
in December
in due course(及时地)
in future
in good season(及时地)
in no time(马上)
in one's childhood
in one's spare time
in one's teens
in one's youth
in recent years
in season(适时)
in seconds(在很短的时间)
in some cases(有时候)
in spring
in the afternoon
in the beginning
in the daytime
in the end
in the evening
in the future
in the long run(最后)
in the meantime
in the morning
in the nick of time(在紧急关头)
in the night
in the past
in the thick of (在最激烈的时刻)
in the thick of(在最激烈的时刻)
in this period
in those days
in time of war
in time

on

on a certain day
on a sudden(突然)
on a winter morning
on Christmas Day
on night shift
on one's birthday
on schedule(按时)
on Sunday
on that date
on the eve of
on the following day
on the instant(马上)
on the moment(立刻)
on the Monday morning
on the New Year's Eve
on the next morning
on the point of(正在…时候)
on the spur of the moment(立刻)
on this day
on this occasion
on time

at

at a time(在某时)
at a wedding(婚礼)
at all times(一直)
at any moment
at any time
at Christmas
at dark (天黑时)
at dawn(在黎明)
at daybreak
at dinner-time
at dusk(在黄昏)
at Easter
at first sight(一见到)
at first
at last
at midnight
at night
at nightfall
at noon
at present
at six clock
at sunrise
at sunset
at that moment
at that time
at the age of
at the beginning of
at the correct time
at the end of
at the last minute
at the moment
at the present stage
at the same time
at the stage(眼下)
at the start
at the time being
at the time of
at the very start
at this point(此时)
at this season
at this time of day
at times(有时

希望能帮到你！

on的意思:在里面 is的意思:是 at的意思:看