课文
Always young「青春常驻」
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!’
译：
我的姑姑詹妮弗是位演员，她至少也有35岁了。尽管如此，她却常在舞台上扮演小姑娘。詹妮弗很快又要参加一个新剧的演出。这一次，她将扮演一个17岁的少女。演出时她必须穿一条鲜红色的裙子和黑色的长筒袜。去年在演另一个剧时，她不得不穿短袜和一件鲜艳的橘红色的衣服。一旦有人问起她有多大年纪，她总是回答：“亲爱的，长成大人真可怕啊！”
词
appear：**v.登场，扮演**
I can’t appear in this dress at the party.「我不能再晚会上穿着这身衣服露面」
出现
Suddenly, a car appeared.「突然，一辆小车出现了」
似乎，好像「同seem」
She appears to know you.「她好像认识你」
disappear「v.不出现」
appearance「n.出现，外貌」
句子
情态动词
情态动词：属于动词，同作谓语，表情态「情绪态度」，但不表动作，动作用其后的动词原形表示。
情态动词特点
不能单独使用
后跟动词原形
没有人称的变化
最多用在现在时和过去时两种时态中
常用的情态动词
原形 过去式
must
may might
can could
will would
shall should
情态动词变疑问/否定
否定后加not，疑问情态动词提前。
must
表推测：must「把握最大」, may, might, can, could
推测现在或将来：
She must be 35 years old.「推测，很有把握」
对比：She is 35 years old.「事实」
推测过去「must只能用现在完成时」：
It must have rained last night.「我想昨晚下雨了（must+have+done）」
表示不可避免的义务
I must do it now.「你必须现在做」
She must do it now.
You must do it now.
课文句子
She must be at least thirty-five years old.「她至少也有35岁了」
两种年龄表示法：
数字+years old
My father is forty-five years old now.
数字+year-old
Last week, my four-year-old, daughter, Saly, was invited to a children’s party.「上周，我四岁的女儿应邀去参加一个儿童晚会」
she must appear in a bright red dress and long black stockings.「演出时她必须穿一条鲜红色的裙子和黑色的长筒袜」
in这里意为「穿着，戴着」
The girl in red over there is my neighbour.「那边那个穿红衣服的女孩是我的邻居」
John was in black dress this morning.「约翰今天上午穿的是件黑衣服」
dress一般指「连衣裙，套裙」，也可指外穿的衣服或特定场合的礼服：
Everyone is in evening dress tonight.「今晚大家都穿了晚礼服」
Darling, it must be terrible to be grown up!「亲爱的，长成大人真可怕啊！」
这句话言外之意是她还没有长大成人，还是个小姑娘，因为她用的表示推测的must。
it为先行词，代替to be grown up，这个不定式是句子真正的主语。
it is a pleasant thing to have many friends.「有许多朋友是件令人愉悦的事」