一课一题一语法：新概念英语第2册第19课
【近期开班】
为了满足广大英语学习者的需求，我们将推出《新概念英语》第一册和第二册的直播课，了解详情请点击以下链接：
Hello大家好！欢迎来到Fun学苑！我是时学教育张老师。又到了我们每周一课一题一语法的分享时间，我们先来公布上一期课后一题的答案。
上一期分享的文章，点击这里回看
下面我们继续本周《新概念英语2》第19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 19 Sold out
'The play may begin at any moment,' I said.
'It may have begun already,' Susan answered.
'I hurried to the ticket office. 'May I have two tickets please?' I asked.
'I'm sorry, we've sold out,' the girl said.
'What a pity!' Susan exclaimed.
Just then, a man hurried to the ticket office.
'Can I return these two tickets?' he asked.
'Certainly,' the girl said.
I went back to the ticket office at once.
'Could I have those two tickets please?' I asked.
'Certainly, 'the girl said, 'but they are for next Wednesday's performance. Do you still want them?’
'I might as well have them,' I said sadly.
——选自《新概念英语》第二册，外语教学与研究出版社，1997年10月第1版
二、重点句型或语法
本课主要学习情态动词can 和may的用法，在课文中出现了表请求和表猜测两种用法。
1. 表示请求
May I have two tickets please?
Can I return these two tickets?
表示请求时，may的语气更委婉，可用在较正式的场合。如：
- May I make an appointment?
- Of course.
2. 表示推测
第17课我们提到肯定的推测用must，而否定的推测用can’t来表示；can’t通常用于把握较大的推测，而may则表达可能发生的事。如：
He can’t have gone to Beijing, because I saw him on the street just now.
He may have been in Beijing, for I haven’t seen him since yesterday.
又如：
It can’t be Jane because she’s on vacation.
It may be Dave. I don’t know.
三、一课一题
根据上文总结的内容，请选择正确的选项。
Bill and Sue always stay at luxury hotels, so they _____ be short of money.
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