如题所述
介系词的功能
(1)当形容词
例：Look at the sentences on theblackboard. (看黑板上的句子。)
(2)当副词
例：Write the sentences (drow) onthe blackboard. (把句子写在黑板上。)
表示时间的介系词
(1) at/on/in (在……)
at+时刻、年龄、正午、半夜
at tenO'clock; at 10:15;
at the age offive;
at noon (中午12点，即正午）
at night (半夜12点）
on+特定的日期、特定的时间、星期~、~月~日.
on mybirthday; on Sunday; on July 12;
in+年、月、周、季节, 早上(in themorning)、下午(in theafternoon)、晚上(in theevening)
例：1. I'll see her in theafternoon. (我下午会和他碰面。)
I'll see her on Sunday afternoon. (我星期天下午会和他碰面。)
2. We went to the zoo in July. (我们7月去过动物园。)
We went to the zoo on July 3. (我们7月3日去过动物园。)
3. They arrived in the morning. (他们在早上抵达。)
They arrived on the morning of October 10. (他们在10月10日早上抵达。)
4. She is at the age of 11. (她11岁。)
5. My English class begins at eight o'clock. (我的英文课在8点开始。)
My English class begins in spring. (我的英文课在春天开始。)
※时间名词前加last (上~), next (下~), this (这~)时, 不可再搭配介系词（因为前面加上this/next/last后就变成了时间副词，而介系词后面只能接名词，所以不能再加介系词了）。
例：l. He's going to leave next week. (他下星期要离开了。)
2. I’ve met him this morning. (我今天早上和他碰面了。)
(2)before (在……之前) / by (在……之前)
before→指在某时间之前
by→指动作完成的期限
例：Please arrive10 o'clock. (请抵达。)
（arrive in Taipei (大地点）,arrive at home(小地点））
(3)in (经过……之后) / within (在……之内)
in→表示经过的时间，一般时间不确定；
within→表示在时间期限之内
例：1. I will be back in a few days. (我过几天回来。)
2. He will come back within an hour. (他一小时之内会回来。)
(4)for (持续) / during (在……期间)
for→表示动作或状态持续的时间长度
during→表示在某段时间当中
例：l. They'll stay for a few days. (他们会停留几天。)
2. I'll take him to that place during his stay. (在他停留期间我会带他去那地方。)
(5)from (从……) / since(从……)
from→表示动作开始的时间点, 常用于现在式、过去式、未来式
since→表示动作从过去某时间开始, 持续到现在, 常用于现在完成式
例：l. He works from Monday to Friday.(他工作从星期一到星期五。)
2. I have been busy since yesterday. (我从昨天就很忙。)
(since 还可以作连接词，since+S+V(常用过去式））
表示地点的介系词
介系词+the/所有格+地点
(l) at / in
at→表示确切的地点
in→表示大范围的地点
例：l. The train stopped at TaipeiStation. (火车停在台北车站。)
2. This book is published in Paris. (这本书在巴黎出版。)
(1)当形容词
例：Look at the sentences on theblackboard. (看黑板上的句子。)
(2)当副词
例：Write the sentences (drow) onthe blackboard. (把句子写在黑板上。)
表示时间的介系词
(1) at/on/in (在……)
at+时刻、年龄、正午、半夜
at tenO'clock; at 10:15;
at the age offive;
at noon (中午12点，即正午）
at night (半夜12点）
on+特定的日期、特定的时间、星期~、~月~日.
on mybirthday; on Sunday; on July 12;
in+年、月、周、季节, 早上(in themorning)、下午(in theafternoon)、晚上(in theevening)
例：1. I'll see her in theafternoon. (我下午会和他碰面。)
I'll see her on Sunday afternoon. (我星期天下午会和他碰面。)
2. We went to the zoo in July. (我们7月去过动物园。)
We went to the zoo on July 3. (我们7月3日去过动物园。)
3. They arrived in the morning. (他们在早上抵达。)
They arrived on the morning of October 10. (他们在10月10日早上抵达。)
4. She is at the age of 11. (她11岁。)
5. My English class begins at eight o'clock. (我的英文课在8点开始。)
My English class begins in spring. (我的英文课在春天开始。)
※时间名词前加last (上~), next (下~), this (这~)时, 不可再搭配介系词（因为前面加上this/next/last后就变成了时间副词，而介系词后面只能接名词，所以不能再加介系词了）。
例：l. He's going to leave next week. (他下星期要离开了。)
2. I’ve met him this morning. (我今天早上和他碰面了。)
(2)before (在……之前) / by (在……之前)
before→指在某时间之前
by→指动作完成的期限
例：Please arrive10 o'clock. (请抵达。)
（arrive in Taipei (大地点）,arrive at home(小地点））
(3)in (经过……之后) / within (在……之内)
in→表示经过的时间，一般时间不确定；
within→表示在时间期限之内
例：1. I will be back in a few days. (我过几天回来。)
2. He will come back within an hour. (他一小时之内会回来。)
(4)for (持续) / during (在……期间)
for→表示动作或状态持续的时间长度
during→表示在某段时间当中
例：l. They'll stay for a few days. (他们会停留几天。)
2. I'll take him to that place during his stay. (在他停留期间我会带他去那地方。)
(5)from (从……) / since(从……)
from→表示动作开始的时间点, 常用于现在式、过去式、未来式
since→表示动作从过去某时间开始, 持续到现在, 常用于现在完成式
例：l. He works from Monday to Friday.(他工作从星期一到星期五。)
2. I have been busy since yesterday. (我从昨天就很忙。)
(since 还可以作连接词，since+S+V(常用过去式））
表示地点的介系词
介系词+the/所有格+地点
(l) at / in
at→表示确切的地点
in→表示大范围的地点
例：l. The train stopped at TaipeiStation. (火车停在台北车站。)
2. This book is published in Paris. (这本书在巴黎出版。)
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