🔍 By air 乘飞机

新概念英语第二册 Lesson 79 · 语法精读与固定搭配分类

NCE Book 2 · Lesson 79（课本印刷页 366-369）· 6 个生词和短语 · 课文 11 句

一全文逐句语法解读

本课是一则「飞机折返」的追忆。语言点集中在 used to do sth.、be used to doing sth. 与 be used to do sth. 的辨析、take charge of、only + 状语置句首引起的倒装，以及 as soon as 引导的时间状语从句。

¶ 1 · 童年飞行（句 1-3）

句子	语法点
I used to travel by air a great deal when I was a boy.	used to do sth. 过去常常做某事 · travel by air 乘飞机旅行 · a great deal 大量（作状语）· 时间状语从句 when 引导
My parents used to live in South America and I used to fly there from Europe in the holidays.	两个 used to 并列，写出一段持续多年的习惯 · in the holidays 在假期里 · fly there from Europe 从欧洲飞到那里
A flight attendant would take charge of me and I never had an unpleasant experience.	would + 动词原形表过去习惯性动作 · a flight attendant 空中乘务员 · take charge of 照管，负责 · never 从不 · an unpleasant experience 一次不愉快的经历

¶ 2 · 一次惊吓（句 4-5）

句子	语法点
I am used to travelling by air and only on one occasion have I ever felt frightened.	be used to doing sth. 习惯于做某事（to 是介词，后接动名词）· on one occasion 有一次 · only + 状语置句首引起倒装 only on one occasion have I ever felt frightened（正常语序为 I have ever felt frightened only on one occasion）
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.	take off 起飞 · gain height 爬高 · 时间状语从句 when 引导（正在……这时突然……）· turn round 掉头 · fly back to 飞回

¶ 3 · 等待降落（句 6-7）

句子	语法点
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.	时间状语从句 while 引导 · wait to land 等待降落 · keep calm 保持镇静 · 时间状语从句 as soon as 引导（一……就……）· touch down （飞机）着陆
Everybody on board was worried and we were curious to find out what had happened.	on board 在（飞机）上 · be curious to do sth. 急于做某事，好奇地做某事 · find out 弄清楚 · 宾语从句 what had happened

¶ 4 · 真相与善后（句 8-11）

句子	语法点
Later we learnt that there was a very important person on board.	learn 得知 · 宾语从句 that 引导 · a very important person 一位非常重要的人物
The police had been told that a bomb had been planted on the plane.	过去完成时的被动语态 had been told / had been planted · plant a bomb 安放炸弹 · 宾语从句 that 引导
After we had landed, the plane was searched thoroughly.	时间状语从句 after 引导 · 被动语态 was searched thoroughly：被彻底搜查
Fortunately, nothing was found and five hours later we were able to take off again.	fortunately 幸运的是 · 被动语态 was found · be able to do sth. 能够做某事 · take off again 再次起飞

二固定搭配与重点词组

短语	用法与例句
used to do sth.	过去常常做某事：I used to travel by air a great deal。
travel by air	乘飞机旅行：I used to travel by air a great deal。
take charge of	照管，负责：A flight attendant would take charge of me。
be used to doing sth.	习惯于做某事：I am used to travelling by air。
on one occasion	有一次：only on one occasion have I ever felt frightened。
take off	起飞：After taking off, we were flying low over the city。
gain height	爬高：（飞行中）缓慢升高：slowly gaining height。
touch down	（飞机）着陆：as soon as it had touched down。

三语法核心总结

used to do sth.

过去常常做某事

be used to doing sth.

习惯于做某事（to 为介词）

only + 状语置句首

引起主句倒装：only on one occasion have I ever felt frightened

as soon as / when 时间从句

as soon as it had touched down / when the plane turned round

used to do / be used to doing / be used to do：三者形似而义异。I used to travel by air 表示「过去常乘飞机」（used to + 动词原形）；I am used to travelling by air 表示「我习惯于乘飞机」（be used to + 动名词，to 是介词）；A knife is used to cut things 表示「刀被用来切东西」（be used to do sth.，被动语态的不定式）。
only + 状语置于句首引起倒装：only on one occasion have I ever felt frightened 中，only on one occasion 移到句首，因此主句要用倒装语序 have I，而不是 I have。同类还有 Only then did he realize the truth.
when 引导的「正在……这时……」：we were flying low over the city and slowly gaining height, when the plane suddenly turned round 中，when 表示「就在这时突然」，主句用过去进行时铺出持续的背景，when 从句用一般过去时点出突发动作。