1、情态动词的用法
本课侧重的是情态动词must和need以及与实义动词短语have to的用法。如：
I must leave now.
You needn't be so rude about it.
We mustn't buy things we don't need.
You don't have to wait for me.
三、课文主要语言点
Do you call that a hat?' I said to my wife. 'You needn't be so rude about it,' my wife answered as she looked at herself in the mirror. 1）call sth. what，把什么叫做什么。注意朗读时要读出I的讽刺语气。 2）needn't是need作为情态动词的用法，后面直接跟动词原形。 3）be rude about it，不讲理、不客气。 4）look at oneself in the mirror，照镜子。 I sat on one of those modern chairs with holes in it and waited. 1）sit on，坐在...之上。如果是坐在沙发上，因为人的身体会陷进去，可以用sit in the sofa。 2）注意作者在本句中对所座的椅子进行了细节描述，凸显了作者等待时的无聊。 3）注意整句话and后面就以一个单词waited结束，凸显了作者的无奈与无聊。 We had been in the hat shop for half an hour and my wife was still in front of the mirror. 1）可提问学生为什么此处的be要采用过去完成时had been的用法（因为作者要描述的是自从他们进了店里到看到她妻子还站在镜子面前照镜子，已经过去半小时了，是要描述过去发生的动作持续到过去的某个时间）。 2）注意句中的“my wife was still in front of the mirror”意在表达我妻子还在照镜子试帽子。 We mustn't buy things we don't need,' I remarked suddenly. I regretted saying it almost at once. 1）注意mustn't（禁止；不能）与needn't（不必）的区别。当要把must所在的肯定句改为否定句时，其否定形式为needn't。 2）注意we don't need是things的定语从句，中间省略了that。need在句中用作实义动词，表示“需要”。 3）remark，评论、注意到。 4）注意regret的两种用法：regret to do，遗憾地做...；regret doing，后悔做...。 5）almost at once，马上。almost在此起强调作用。 You needn't have said that,' my wife answered. 'I needn't remind you of the terrible tie you bought yesterday.' 1）needn't have done，没必要做...。这是对过去发生的事情的虚拟。注意与后面的needn't do（对现在情况的描述）的区别。 2）remind sb. of sth.，提醒某人某事。 3）注意you bought yesterday是tie的定语从句，中间省略了that或which。 I find it beautiful,' I said. 'A man can never have too many ties.' 'And a woman can't have too many hats,' she answered. 1）find sth. how，发现什么东西怎么样。此时的find表示“觉得，认为”。 2）A man can never have too many ties. 男人有再多领带也不过分。 3）A woman can't have too many hats. 女人有再多帽子也不过分。 Ten minutes later we walked out of the shop together. My wife was wearing a hat that looked like a lighthouse. 1）时间 later，多长时间之后。 2）together，一起。 3）可提问学生此处的wear为什么采用过去进行时（作者是为了形象地描述他妻子走出店里时的样子，试图引起读者的注意）。注意wear（侧重穿好的状态）与put on（侧重穿的动作）的区别。 4）that looked like a lighthouse用作hat的定语从句。 四、读写重点
注意课文中出现的“A man can never have too many ties.”和“A woman can't have too many hats.”。否定副词 too，表示“再...也不为过”，如：
One can never be too careful when driving a car.
五、语用文化
可介绍常见帽子的种类及其英文表达。
六、教学建议
1、情态动词must的用法在第17课已经学过，可以在本课里进行归纳总结（表“必须”和“很可能”）。当表“必须”时，要注意其否定形式，以及与have to的区别；当表“很可能”时，要注意对现在和过去发生的事情的猜测时的不同用法，以及与can't（否定猜测）的区别。
2、need在英语里被称作半情态动词，是因为它既可以用作情态动词，又可以用作实义动词。其用法需要重点讲解。当用作情态动词时，其用法为：need do sth.，否定为needn't do sth.；当用作实义动词时，其用法为：need to do sth.，否定形式为：don't need to do sth.。
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