小学英语语法——时间介词：in, on, at

时间介词：in, on, at
什么是时间介词？
时间介词是表示时间的介词。

时
间
介
词
辨
析 in at
on
in
表示一段时间1. 用于表月份、季节、年份的词前。

例：in May; in summer; in 2019
2. 与morning/afternoon/evening
连用
例：in the morning/afternoon/evening
1. 用于星期、日期，或
特定日期的早上、下午、晚上前;
2. 与day搭配，表示具体某一天。

例：We have six classess on Monday.
New Year's Day is on January 1st.
Mary was born on a cold day.
on
表示具体的某一天
1. 表示具体的时刻，意为“在某一时刻”，常与o'clock，half past等表示具体时间的短语连用。

例：
I always get up at 7:00 o'clock.
We'll have lunch at half past
twelve.
2. 表示人的年龄，用于固定搭配“at the age of...”，意为“在……岁时”。

常用于一般过去时中。

例：
I started to learn English at the
age of four.
3. 表示一段时间，意为“在……期间”。

例：
It was ver cold at night.
Sally and her family had a good time at
Chrismas.（这里不是只指在圣诞节当天）
Practice
1. There are many flowers _____________
spring.2. I'm going to buy a gift ______________ the afternoon of May 30th.3. Lily went to the park ______________ four yesterday afternoon.
in on
at
See you next time!。