02-01
In/On/At: Place
in/on/at 表地点💡 概念 Concept
in = inside a space (city, room, box); on = on a surface (wall, table, floor); at = a point or location (bus stop, door, address).in 表示在空间内部（城市、房间、盒子）；on 表示在表面上（墙、桌子、地板）；at 表示某个点或位置（车站、门口、地址）。
📐 规则 Rules
in
containment: in the room, in Shanghai, in the box
空间内：in the room（房间里）、in Shanghai（在上海）
on
surface: on the wall, on the table, on the floor
表面：on the wall（墙上）、on the table（桌上）
at
point/location: at the bus stop, at the door, at 25 Main Street
点/地点：at the bus stop（公交站）、at the door（门口）
✏️ 例句 Examples
She is waiting in the waiting room.
她在候诊室里等着。
The picture is on the wall.
画在墙上。
Meet me at the entrance.
在入口处见我。
⚠️ 常见错误 Common Mistakes
❌ on Shanghai → cities use in: in Shanghai.❌ 城市用 in：in Shanghai。
❌ in the bus stop → a stop is a point: at the bus stop.❌ 车站是【点】，用 at。
02-02
In/On/At: Time
in/on/at 表时间💡 概念 Concept
at = precise times (3 o'clock, noon, night); on = days and dates (Monday, May 1st); in = longer periods (months, years, seasons, morning/afternoon/evening).at 用于精确时间点（三点、正午、夜晚）；on 用于某一天/日期（周一、5月1日）；in 用于较长时段（月份、年份、季节、上午/下午/晚上）。
📐 规则 Rules
at
at 8 o'clock, at noon, at night, at midnight
at 8 o'clock（八点）、at noon（正午）、at night（夜晚）
on
on Monday, on June 5th, on my birthday
on Monday（周一）、on June 5th（6月5日）、on my birthday（我生日那天）
in
in the morning, in July, in 2026, in summer
in the morning（早上）、in July（七月）、in 2026（2026年）、in summer（夏天）
✏️ 例句 Examples
The meeting starts at 9 a.m.
会议上午九点开始。
We have a test on Friday.
我们周五有考试。
I was born in March.
我三月出生。
⚠️ 常见错误 Common Mistakes
❌ in Friday → days use on: on Friday.❌ 星期几用 on：on Friday。
❌ at the morning → use in the morning.❌ 早上用 in：in the morning。
02-03
Mixed Prepositions
混合介词💡 概念 Concept
Choose the preposition by the relationship: across (from one side to the other), through (from inside to out), over (above), under (below), between (two), among (many), by (near/means), with (together/using), about (topic).根据概念关系选介词：across 横穿、through 穿过、over 上方、under 下方、between 两者之间、among 众多之间、by 旁边/方式、with 伴随/工具、about 关于。
📐 规则 Rules
方位
across the street, through the tunnel, over the bridge, under the table
across the street（街对面）、through the tunnel（穿过隧道）、over the bridge（桥上）、under the table（桌下）
之间
between you and me; among friends
between 两者之间；among 三者以上之间
方式/主题
by train, with a pen, a book about history
by train（乘火车）、with a pen（用笔）、a book about history（历史书）
✏️ 例句 Examples
We walked across the bridge.
我们走过桥。
She paid by card, not with cash.
她用卡支付，不用现金。
The letter is between the books.
信在书之间。
⚠️ 常见错误 Common Mistakes
❌ between my friends (3+) → use among.❌ 三个以上用 among。
❌ go in the door → movement through: go through the door.❌ 穿过门用 through。
02-04
Production and Editing
综合运用与改错💡 概念 Concept
Check every noun for the correct preposition; memorize common verb + preposition pairs (listen to, wait for, depend on, good at).检查每个名词前的介词；牢记常用动介搭配（listen to 听、wait for 等待、depend on 依靠、good at 擅长）。
📐 规则 Rules
固定搭配
verb + preposition: listen to music, wait for the bus, depend on you
动词+介词：listen to music（听音乐）、wait for the bus（等公交）、depend on you（依靠你）
形容词+介词
good at, interested in, afraid of, proud of
形容词+介词：good at（擅长）、interested in（感兴趣）、afraid of（害怕）、proud of（自豪）
✏️ 例句 Examples
She is good at math and interested in science.
她擅长数学，对科学感兴趣。
I'm waiting for the bus at the stop.
我在车站等公交。
His success depends on hard work.
他的成功取决于努力。
⚠️ 常见错误 Common Mistakes
❌ listen music → listen to music.❌ listen 后要加 to。
❌ afraid from → afraid of.❌ afraid 后接 of。
PR
课堂练习 Practice
选自 GramLingo 题库Q1The cat is sleeping ___ the box.
点击选项上方文字已展开答案 · 正确答案由 GramLingo 题库提供
Q2I usually wake up ___ 7 o'clock.
点击选项上方文字已展开答案 · 正确答案由 GramLingo 题库提供
Q3Fill: I will be back ___ a few minutes.
点击选项上方文字已展开答案 · 正确答案由 GramLingo 题库提供