“on” ，If someone or something is on a surface or object, the surface of object is immediately below them and is supporting their weight .在……上（面）
onColumbus Street onSeventh Avenue
onthe floor ona bus
onthe chair onthe wall
"at", you use at to indicate the place or event where something happens or is situated. 在（某地）
at456 State Street at the station
atthe concert atmy Granny's
"next to" , in or into a position right beside sb/sth. 紧邻，在……旁边
next tome next tothe door
We sat next toeach other.
over,If one thing is over another thing or is moving over it, the first thing is directly above the second, either resting on it, or with a space between them. 主要强调在某一物体的正上方。
The bridgeoverthe river has a long history.
The lamp hung overthe table.
under, If a person or thing is under something, they are at a lower level than that thing, and may be covered or hidden by it .强调正下方，是over是一组反义词。
A cat is sittingunderyour feet.
There is a pair of shoes underyour bed.
above,if one thing is above another one, it is directly over it or higher than it. 强调在上方，不一定在正上方，可指温度、海拔等的刻度。
He lifted his hand abovehis head.
The plane flew abovethe clouds.
The average temperature here is well above30 ℃ .
below,if something is below something else, it is in a lower position.强调在下方，不一定是正下方，可指温度、海拔等的刻度，与above是一组反义词。
He lives belowthe mountain.
The average temperature in summer in Qingdao is below 30 ℃ .
2. 时间介词 Prepositions of Time
▲ Prepositions of time?
Prepositions of Time: A preposition of time is a preposition that allows you to discuss a specific time period. 介词可以放在特定时间（时期）前。
inthe 1900's inthe 90's
in 2020 inJanuary
inthe past inthe morning
onMonday onMonday morning
ona rainy day onMay the first
ona cold day onChildren'd Day
onthe following day
onthe following evening
at 7:30 atfirst
atnight atmidnight
atnoon atthe moment
atpresent atthe present time
atthe end of atthe beginning
More Prepositions of Time:
We stayed at a student hostel duringthe conference.
I’m just going to bed fortwo hours or so.
We’ll wait till/ untilhalf past six for you.
The factory has been here sincethe 1970s.
Her visit will extend from Monday to Thursday.
He left the house over an hour ago.
She’s always up beforedawn.
He had promised to be back by five o’clock.
I felt fairly relaxed aftertaking the medicine.
It’s a quartertotwo.
It’s just three days toHalloween.
It’s five pastten.
The team have a lot of work to do between now andSunday.
You should receive a reply withinseven days.
Other Prepositions : 其他常见介词（或固定搭配 ）
from Monday to Friday
in front of the house in place of
trust in success in/at
at home at school
at the cinema at the back of
at the top of at the bottom of
by the lake by Friday
by now by tomorrow
by the way by oneself
attention to way to
listen to music write to sb.
polite to kind to
key to the door key to the answer
for example for years
for a moment for some reason
angry about think about
worry about talk about
speak about care about
busy with strict with
介词种类非常多，有些介词可以总结出规则，有些不可以，所以，平时要多留意，多运用，积累得多介词的使用会更恰当。
3. Games 介词游戏
1. 地点介词游戏（家中物品做道具）
把家里的凳子拿过来当道具，和孩子一起玩，可以打印介词模板，根据图卡提示让孩子站在合适的位置。另一种玩法是，闭上眼睛，家长猜孩子的位置，并说：Are you on the chair ? 孩子根据实际情况说：Yes， I am on the chair . / No, I am under the chair.
有纸箱子不要急于扔掉，孩子们喜欢“钻”在里面，用来玩介词也很赞。
用纸杯做“一栋”房子，再拿一个小玩具，可以一方说句子，另一方“摆造型”，还可以多准备几套材料，一个人说，其他人“摆造型”，看谁反应得快。
2. 介词游戏卡Free dog and prepositional words
共14页，彩色和黑白两套模板，可以装订成册阅读，也可以自由组合玩游戏，根据地点介词的提示移动小狗的位置。
用美工刀在房子的两侧切一条缝玩起来更完美。
Where is the dog ? It's behind the house.
模板截图：
3. Preposition flower
用彩纸自制成花朵形介词卡，花朵中间写介词概念（或者用法），花瓣上写介词，花瓣下面可以画图，也可以写句子。
4. 介词海报（时间介词4张+地点介词8张），图文结合更易于理解和记忆。
4. Worksheets 练习题
1. Bug Prepositions （共7页）
2. Circle the correct preposition（共2页）
3. Prepositions of time worksheets
4. Cut and paste
5. 介词练习题（共4页，适合小学4-5年级，选择题和填空，含答案）
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