Lesson 17 Always young
·单词
appear v. 登场，扮演；出现
·disappear v. 消失
·appearance n. 出现，外貌
stage n. 舞台
·on the stage 站在舞台上
·stage fright 怯场
bright adj. 鲜艳的（光明的。聪明的）
·bright red/colour 鲜艳的 红色/颜色
·bright future/prospect 光明的 未来/前景
·look on the bright side of things 看向事情光明的一面，积极一点
·He is very bright. 他非常聪明
stocking n. 长筒袜
sock n. 短袜
·本课句型
情态动词（指对某一件事的情绪态度）
·1.情态动词后面要加动词原形 2.情态动词没有人称的变化 3.情态动词只有现在时态和过去式
·变否定（直接在情态动词后面加not）
·变疑问（情态动词提前到句首）
·情态动词具有单一性，指一句话中只能有一个情态动词
·must
·表示推测 “肯定，一定”（可能性最高，非常有把握的推测）
·She must be 35 years old. 她肯定35岁大了
·You must be the new teacher. 你肯定是老师
·He looks pale. He must be ill. 他看起来脸色苍白，他一定是病了
·She must sit over there. 她一定坐在那边
·表示不可避免的义务 “必须”
·I must do it now. 我必须现在就做
·She must do it now. 她必须现在就做
·You must do it tomorrow. 你必明天做这件事（在英语里，现在也可以表将来，但must不能用于过去时）
·想使用 must 表示过去，需要用另一个词 have to，都是必须的意思，不过需要注意 have to 与情态动词不一样，需要根据主语变换人称，和时态
·I have to do it now.
·She has to do it now.
·You will have to do it tomorrow.
·They had to do it yesterday.
·may might （有过去式的情态动词有两种含义:1.表示过去能做这事 2.可以不表示过去式，表示现在，语气更加委婉的现在）
·can could
·will would
·shall should ...
·课文
My aunt Jennifer is an actress. She must be at least thirty-five years old. In spite of this, she often appears on the stage as a young girl. Jennifer will have to take part in a new play soon. This time, she will be a girl of seventeen. In the play, she must appear in a bright red dress and long black stockings. Last year in another play, she had to wear short socks and a bright, orange-coloured dress. If anyone ever asked her how old she is, she always answers, 'Darling, it must be terrible to be grown up!'
at least 至少
in spite of 尽管 = despite prep. 尽管
take part in 参加
in + 衣服 表示穿着
how old she is 在原文中本句话是宾语从句，需要调整语序
·知识拓展
-Good morning. I' ve got an appointment with Miss Smith in the Personnel Department.
- Ah, good morning. You____be Mrs. Peters.
A.might
B.must
C.would
D.can
(高考真题)
根据上文所说的预约，还有 good morning 可以得知两人在交谈，固定时间的预约一定是固定的人，所以选 B ，must，你一定是 Mrs. Peters.
I can' t boot my computer now.
Something____(一定出了毛病) with its operation system. .
(四级真题)
填 must be wrong ，根据中文写翻译
推测现在
You must be the new teacher.
They must be waiting for you.
推测过去
It must have rained last night. 昨天晚上一定下雨了
She must have cried just now. 她刚才肯定哭过
