一课一题一语法：新概念英语第2册第79课
【往期回顾】
一课一题一语法：新概念英语第2册第78课
【答案】
1. The policeman caught the thief by _the_ arm. (his / the / an)
2. _None_ of the four children is going there today. (all / either / none)
3. The man is in _不填_ possession of a large fortune. He is very rich. (a / the / 不填)
【本期内容】
下面我们继续本周《新概念英语2》第79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 79 By air
I used to travel by air a great deal when I was a boy. My parents used to live in South America and I used to fly there from Europe in the holidays. A flight attendant would take charge of me and I never had an unpleasant experience. I am used to travelling by air and only on one occasion have I ever felt frightened. After taking off, we were flying low over the city and slowly gaining height, when the plane suddenly turned round and flew back to the airport. While we were waiting to land, a flight attendant told us to keep calm and to get off the plane quietly as soon as it had touched down. Everybody on board was worried and we were curious to find out what had happened. Later we learnt that there was a very important person on board. The police had been told that a bomb had been planted on the plane. After we had landed, the plane was searched thoroughly. Fortunately, nothing was found and five hours later we were able to take off again.
大家可以从下面购买《新概念英语》第二册的官方教材：
二、重点句型或语法
本课主要是复习第7课、第31课和第55课所学的一般过去时、过去进行时与used to do和would do的内容。
（一）一般过去时
1、构成方式
主语 + was / were / did + 其他成分
如：
They were in the living room ten minutes ago.
The man gave her some money last week.
2、基本用法
表示过去发生的事情。如：
She learnt of his death in the battle the other day.
这句话只是在客观描述过去“I”做了什么事情。
3、标志词
1）yesterday系列
2）last系列
3）ago系列
4）in+过去年份或年代
5）this系列
6）短语系列（如just now、the other day）
如：
We left Beijing in 1998.
He called me this morning.
（二）过去进行时
1、构成方式
主语 + was / were doing + 其他成分
如：
She was sleeping when he came back.
2、基本用法
表示过去某个时刻或时段正在进行的动作。如：
He was cooking in the kitchen this time yesterday.
3、标志词
1）时刻+过去时间，如：at five yesterday afternoon
2）时段+过去时间，如：from eight to ten last night
3）this time+过去时间，如：this time last Friday
4）when/while引导表过去的动作或状态的从句
5）all或the whole+时间单位+过去时间
如：
He was helping his father the whole afternoon yesterday.
While she was working in the garden, she cut her finger.
（三）used to do
1、构成方式
sb. + used to do + 其他成分
如：
He used to smoke a lot.
2、基本用法
表过去经常或习惯做某事（但现在不再如此）。如：
She used to get up early on Sundays.
这句话的意思是：她过去星期天经常早起。其潜台词是：她现在星期天不早起了。
（四）would do
1、构成方式
sb. + would do + 其他成分
如：
I would go for a swim in summer when I was young.
2、与used to do的区别
would do只能表动作，不能表状态，而且必须与过去时间连用，would do也没有否定表达。如：
1) She used to have long hair.
2) She would take a walk by the river after dinner when she lived with her parents.
第1句就不能用would do，因为have是静态动词，表状态，不是动作。
第2句would take可以替换为used to take，而且即便后面没有when she lived with her parents，也可以用used to take来表达，但此时就不能用would take了。
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，选择适合的单词或短语填空。
1. She _____ be very small, but now she has grown to be a very tall girl. (used to / would)
2. He _____ a book when she came in. (read / was reading)
3. I _____ go fishing in the river in summer in my childhood. (used to / would)
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