一课一题一语法：新概念英语第2册第67课
【本期内容】
下面我们继续本周《新概念英语2》第67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 67 Volcanoes
Haroun Tazieff, the Polish scientist, has spent his lifetime studying active volcanoes and deep caves in all parts of the world. In 1948, he went to Lake Kivu in the Congo to observe a new volcano which he later named Kituro. Tazieff was able to set up his camp very close to the volcano while it was erupting violently. Though he managed to take a number of brilliant photographs, he could not stay near the volcano for very long. He noticed that a river of liquid rock was coming towards him. It threatened to surround him completely, but Tazieff managed to escape just in time. He waited until the volcano became quiet and he was able to return two days later. This time, he managed to climb into the mouth of Kituro so that he could take photographs and measure temperatures. Tazieff has often risked his life in this way. He has been able to tell us more about active volcanoes than any man alive.
大家可以从下面购买《新概念英语》第二册的官方教材：
本课主要学习的是can、be able to和manage的用法。
（一）can
作为情态动词，can主要用来表达能力或许可。
1、表“能够；会”，如：
He can fly a plane.
他会开飞机。
2、表“可以”，如：
You can go home now.
你现在可以回家了。
【注意】
can有时可以用来表达某种事实性的论断，如：
Eating too much sugar can lead to health problems.
食用过多的糖会引起健康问题。
（二）be able to
其基本用法为：sb. be able to do sth.，如：
You need to be able to work as part of a team.
你必须能作为团队的一员去工作。
【注意】
与can相比，be able to可以用来表示“费了好大劲之后得以做成某事”，如：
He was able to leave Germany for America during the World War Two.
在二战期间，他设法离开德国去了美国。
此外，can表示的能力是主体本身具有的，而be able to则表示主体经过努力之后可以达到的能力。如：
I can swim fast. （我游得很快）
I am able to swim fast. （我可以游得很快）
（三）manage
该词表示“设法做成”，其基本用法为：sb. manage to do sth.，如：
He managed to get a good price for the car. 他终于把汽车卖了个好价钱。
【注意】
manage也可以表示“管理；经营”，如：
He was asked to manage a football team.
他被要求去管理一支足球队。
三、一课一题
根据本课的重要语法点，让我们来练一练吧，请选择正确的选项。
He _____ leave his hometown during the war, but he chose to stay, and managed _____ fight againt the invaders.