Question

in on at 用法~~

用in的场合
（1）表示“在某年/月/季节”这个含义时，须用介词in
It often rains here in summer.夏天这里常常下雨。
（2）表示“从现在起一段时间以后”时，须用介词in。例如：
They will go to see you in a week.他们将在一周后去看望你。
（3）表示“在某世纪”时，须用介词in.例如:
This machine was invented in the eighteenth centur（4）表示“在某年代或特定世纪某年代”时，须用介词in。 除此之外，morning / evening / afternoon 三个词也常跟介词in连用

用on的场合
（1）表示“在具体的某一天”或“（在具体的某一天的）早上、中午、晚上”等，须用介词on。例如：
Jack was born on May 10th
（2）表示“在星期几”或“在星期几的早上、中午、晚上”等，须用介词on。例如：
We don't go to school on Saturday and Sunda
（3）表示“在某一节日”时，须用介词on。例如：
We usually eat mooncakes on Mid-autumn Festiva
morning,evening,afternoon被of短语修饰，习惯上用in,而不用on.

用at的场合
（1）表示“某一具体时刻（即几点几分时）”，须用介词at。例如：
He gets up at six o'clock every day
（2）用在特定的时候（时节、时机）时，须用介词at。例如：
They were happy at that time.
（3）表示“在中午、在夜晚、在周末”时，须用介词at。例如：
What do you often do at noon?

（4）表示“在……岁”时，须用介词at。例如：
At the age of nine ,the boy could swim wel
求高人看一下，有没有错，有没有要补充的了。

Answer 1

morning,evening,afternoon被of短语修饰，习惯上用in,而不用on.

你这样的说法 我理解成in the morning of friday
被搞糊涂了 这里是我找到的解释

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 the morning of July 2, on Sunday afternoon, on a cold winter evening

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．

【你的提问真的很有帮助 ，谢谢！】

Answer 2

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

追问

morning,evening,afternoon有修饰的用什么？？

追答

in the mornig / afternoon/ evening
用ON
on a summer morning /afternoon/ evening
on the morning/ afternoon/ evening of February the third, 2012
on a weekend morning/ afternoon/ evening

Answer 3

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