1.语法讲解：
情态动词need和must的用法
情态动词need和must的否定形式与肯定形式差别很大。
肯定式/否定式/其他
need 需要/needn't 不必，不许/do not need 不需要
must 必须/mustn't 不应该/must=should=ought to 应当
2. My wife was wearing a hat that looked like a lighthouse!
我妻子戴着一顶像灯塔一样的帽子！
知识点：that looked like a lighthouse是定语从句，修饰限定hat, that是关系代词,在从句中作主语。
3. "You needn't have said that," my wife answered. "I needn't remind you of that terrible tieyou bought yesterday."
“你没必要这样说，”我妻子回答说，“我也不必提醒你昨天买的那条糟糕透了的领带。”
知识点：needn’t have done用来表示过去不必要发生的动作，但是却发生了。
I needn't have recited all the passages.
我原本没有必要背诵所有的段落。
4. "Do you call that a hat?" I said to my wife.
“你把那个叫帽子吗？” 我对妻子说。
知识点：call sth.… 称某物为……
