时间前面加的介词in，at，on的区别及用法？

Question

如题所述

Answer 1

on“在具体某一天”①
“当某时”，动名词，
arrival，death前；early，late位句先②，用in一般“上”“下”“晚”；on用于天，in用于月、季、年③；限定三时in要变。④at是个时间点，“工作”“时刻”与“圣诞”⑤。at
noon（night），in
the
day，习惯用语记心间。
注：①on表示在具体某一天及具体某一天的上午、下午和晚上。
例
On
mother's
Day,
we
should
send
flowers
to
our
mother.
母亲节，我们应该送花给我们的母亲。
On
my
arrival
home，I
found
he
had
gone
already．当我到家时，我发现他已经走了。
②
当early，late用于句首修饰介词短语时，尽管表示具体某一天的上午、下午、晚上，都要用in，泛指一般的上、下午，晚上也用in
。
例
Early
in
the
morning
of
National
Day，I
got
up
to
catch
the
first
bus
to
the
zoo．
国庆节一清早，我便起床去赶到动物园的第一班公共汽车。
My
father
begins
work
at
8：00
in
the
morning
and
stops
work
at
4：00
in
the
afternoon．
我父亲上午8点上班，下午4点下班。
③于将来时态表示“过一段时间后”
及表示“在……期间”
和“在某个季节，某年、某月”
都用in。
例
I
hear
he’ll
be
back
in
a
month．我听说他将于一个月后回来。
In
the
course
of
the
last
lesson
in
French，little
Franz
was
listening
to
the
master
very
attentively．在那最后一堂法语课中，小弗朗兹非常用心地听着老师讲。
Xiao
Ming
was
born
in
December
of
2004.
小明生于2004年12月。
④当
morning，afternoon，evening有前位定语或后置定语限定时，就不用in而用on。例
on
a
hot
(summer)
noon
在一个炎热（夏天）的中午
on
Monday
morning
在星期一上午
on
the
morning
of
March
8th在3月8日上午
⑤
表示某时某刻及在work，Christmas前用at。
例
We
get
up
at
eight
o’clock．
我们8点起床。
My
father
are
busily
at
work
all
day．
我父亲整天忙于工作。
In
western
countries
children
get
present
from
their
parents
at
Christmas．
在西方国家，孩子们在圣诞节得到父亲给的礼物

Answer 2

1、
介词on用在时间上，表示某一具体的时间前面（常表达某一天），
如：on
Sunday
morning
,
on
july
,
25.
2、
介词in用在时间上，
表示在某一特定时间里，或者某段时间之后，
如：in
the
morning,
in
a
week.
3、介词at用在在时间上，是用某一点时间前面，
如：at
six
o'clock.

Answer 3

记住，以下内容对中考和高考非常有用，要仔细阅读和背出来：
in
January
in
winter
in
1999;
in
the
morning/
afternoon
/evening.
in
the
daytime
on
Monday,
on
Sunday
afternoon,
on
July
1st,
2011
at
six
o’clock,
at
three
thirty.
at
night,
at
noon,
at
this
time
of
year.
in
a
year
in
spring
in
September
in
a
week
,
in
two
weeks
in
two
weeks'
time
on
Monday
on
Monday
afternoon
on
March
7th,
2000
at
eight
o’clock
at
this
time
of
day
/year
at
the
moment
in
the
summer
/
winter
holiday
at
Christmas
on
Christmas
Day
/
Eve
/
afternoon
on
the
evening
of
May
31st,2011
on
National
Day
on
Children's
Day
on
the
day
of
my
arrival
/
departure
on
the
day
she
comes
in
the
year
I
was
born
on
the
very
Monday
she
fell
ill
on
Thanksgiving
Day
during
our
stay
in
Japan
in
Tom's
absence
in
the
presence
of
my
friends
on
our
way
to
the
library
on
their
first
trip
to
Shanghai
on
a
voyage
inthe
Atlantic
Ocean