一课一题一语法：新概念英语第2册第81课
【往期回顾】
1. She doesn't play basketball as _well_ (good) as her sister.
2. Sound travels _more slowly_ (slow) than light.
3. I have three sisters. My _eldest_ (old) sister is very dear to me.
【本期内容】
下面我们继续本周《新概念英语2》第81课的重点句型或语法的分享。先来读一读课文：
一、课文原文
Lesson 81 Escape
When he had killed the guard, the prisoner of war quickly dragged him into the bushes. Working rapidly in the darkness, he soon changed into the dead man's clothes. Now, dressed in a blue uniform and with a rifle over his shoulder, the prisoner marched boldly up and down in front of the camp. He could hear shouting in the camp itself. Lights were blazing and men were running here and there: they had just discovered that a prisoner had escaped. At that moment, a large black car with four officers inside it, stopped at the camp gates. The officers got out and the prisoner stood to attention and saluted as they passed. When they had gone, the driver of the car came towards him. The man obviously wanted to talk. He was rather elderly with grey hair and clear blue eyes. The prisoner felt sorry for him, but there was nothing else he could do. As the man came near, the prisoner knocked him to the ground with a sharp blow. Then, jumping into the car, he drove off as quickly as he could.
本课主要是复习第9课、第33课和第57课所学的介词的用法。
（一）第9课
本课侧重学习的是表时间的介词，主要有：
1、at
后接时刻，即几点几分，如：
at five
at ten past eight
at nine to eleven
2、on
后接日期或星期，即具体哪一天，如：
on Wednesday
on July 2nd, 2021
on a sunny morning
3、in
后接月份、季度和年份，如：
in August
in summer
in 1997
（二）第33课
本课侧重学习的是表趋向的介词，主要有：
1、from和to，如：
from Shanghai to Beijing
go to Beijing
start from London
2、into和out of，如：
walk into the garden
come out of the building
3、for
leave for Paris
set out for Tokyo
4、towards
come towards me
（三）第57课
本课侧重学习的是表地点的介词，主要有：
1、at
后接门牌地址或城市站点，如：
at the door
at 27 West Street
at the railway station
2、in
后接城镇国家等，或表在某地内部，如：
in Berlin
in France
in the room
3、off
表离开某地或从某处脱离，如：
off the course
off the table
（四）in和with的特殊用法
1、in
in可以后接颜色表示穿戴什么颜色的衣帽，或后接衣帽表示穿戴者什么衣帽。也可以后接语言，表示用什么语言说或写，如：
She is in red today.
She is in a red coat today.
She wrote a letter to him in German.
2、with
with可以后接某物，表伴随，或者后接工具，表使用什么工具，如：
She came into the classroom with a book in her hand.
The girl with long hair is my sister.
She cut the paper with a knife.
三、一课一题
根据本课的复习内容，让我们来练一练吧，请根据句子的前后文，用适当的介词填空填空。
1. He went there by car _____ a rainy morning.
2. It often rains _____ spring in Shanghai.
3. People will gather together _____ Christmas.
4. The man _____ black is my father.
5. They have already left Paris _____ Moscow.