Unit 1 Section Ⅰ Starting out & Understanding ideas（课件PPT）-【优化指导】2024-2025学年新教材高中英语选择性必修第三册（外研版2019）

UNIT 1　Face values (单元主题语境：人与自我——外表与内心的关系) Section Ⅰ　Starting out & Understanding ideas 栏 目 索 引 自主落实·掌握语言知识 熟读精思·研读文本精华 互动探究·精研核心知识 Ⅰ.重点词汇 1．_____ v．促进，推动 2．_________ adj.痴迷的，迷恋的；过度的(含贬义) 3．_______ v．假装，装作 4．________ v．对(人或情况)判断错误 5．_________ adj.完全相同的；非常相似的 6．_________ n．寝室 7．_______ adj.古怪的；奇异的 8．____ n．药丸，药片 自主落实·掌握语言知识 boost obsessive pretend misjudge identical dormitory bizarre pill UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Ⅱ.拓展词汇 1．_____________ adj.自我批评的，自我批判的→criticize/criticise v．批评；评论→criticism n．批评；评论→critic n．批评家；评论员→critical adj.批评的；批判性的 2．_______ v．(使)增大，扩大→large adj.大的；大规模的 3．__________ n．自我陶醉者→narcissism n．自我陶醉；自恋→narcissistic adj.自我陶醉的；自我欣赏的 4．________ v．忽视，忽略→overlooker n．检查员 self-critical enlarge narcissist overlook UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 5．______ v．(使)苦恼→bothersome adj.恼人的；烦人的 6．______ adj.极瘦的，皮包骨的→skin n．皮；皮肤 7．___________ v．承认(某事属实或某情况存在)→acknowledgment/acknowledgement n．承认；感谢 bother skinny acknowledge UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Ⅲ.短语互译 1．在……方面；从……角度看；根据……来说___________ 2．增强某人的信心______________________ 3．缺乏……_________ 4．渴望____________ 5．倾向于做某事_______________ 6．从头到脚________________ in terms of boost one's confidence a lack of a desire for tend to do sth. from head to toe UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 7．在……中发挥作用______________ 8．make an effort with sth.____________ 9．leave a positive first impression on sb.___________________________ 10．stare at ___________ 11．try every means ___________ play a part in 努力做某事 给某人留下良好的第一印象 盯着……看 千方百计 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 12．come across ___________ 13．keep fit/healthy ___________ 14．attempt to do sth.____________ 15．register for ____________ 偶然遇到 保持健康 试图做某事 报名参加 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Ⅳ.重点句式 1．句型：as引导定语从句 教材原句： As a song in Ugly Betty puts it，“It's a pretty person's world”． 翻译：_______________________________________________________ 正如《丑女贝蒂》中的一首插曲所唱，“这是一个看脸的世界”。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 2．句型：That's why ...那就是……的原因。 教材原句：That's why I could never understand my sister，who has 17 lipsticks and can't decide which one to use every morning. 翻译：______________________________________________________ ___________________________ 那就是我永远无法理解我姐姐的原因，她有17支口红，每天早 上都拿不定主意该用哪一支。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 熟读精思·研读文本精华 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ❶what和how引导的宾语从句，并列作动词discover的宾语。 Jade，24，accounting②manager ❷As a song in Ugly Betty puts③ it，“It's a pretty person's world”．I understand this more than most，❸as I have always been plain-looking④．I'm a girl who'd love to look good.Well，who wouldn't？So，ever since I discovered selfie apps that could remove my freckles，enlarge⑤my eyes and even slim my jawline，I have become addicted⑥.I spend hours every day editing my selfies，posting them and eagerly checking my phone a hundred times for comments.Each UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 “like” boosts⑦my confidence.Dad thinks I am a narcissist，❹but what I say is that my pictures aren't hurting anyone，so who cares? UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ❷as引导的非限制性定语从句，as意为“正如，就像”，指代整个主句。 ❸as引导的原因状语从句，as意为“因为，由于”。 ❹what I say是主语从句，what在从句中作say的宾语；that引导表语从句。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Dr Hart says： Obsessive online photo editing indicates a lack of self-confidence⑧ and a desire for attention⑨.However，the image Jade presentsto obtain⑪ the praise of others is false.People ❺who pretend⑫ to be someone they are not tend to⑬ misjudge⑭ themselves. UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ❺who引导的定语从句，修饰people；they are not为省略了关系代词that的定语从句，修饰someone。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Anthony，21，college student I never really cared about my appearance.❻That's why I could never understand my sister，who has 17 lipsticks and can't decide which one to use every morning.I only used to have five identical⑮ pairs of trousers and five identical shirts.When I first moved into my dormitory⑯ at college，this made my roommates⑰ quite confused as they saw me in the same clothes day after day.Last month they registered me for⑱ a TV programme，A New You.It felt bizarre at first.I didn't like being reviewed from head to toe⑲.But I was UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 surprised at how good I looked after the makeover⑳！For the first time in my life I saw myself as a handsome and well-presented young man.At that moment，I perceived that external beauty isn't totally worthless.It can be an expression of our personalities，helping us make a good and positive impression on others. UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ❻“That's why ...”句型，表示“那就是……的原因”。其中who引导非限制性定语从句，修饰先行词my sister；该定语从句中的which one to use every morning作decide的宾语，属于“特殊疑问词＋不定式”结构。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Dr Hart says： ❼It's true that inner beauty is very important，but external beauty shouldn't be completely overlooked.It plays a part in the image we present to the world，and making an effort with your appearance can leave a positive first impression on others and boost your confidence. UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ❼此处的It是形式主语，真正的主语是后面的that引导的从句。 Emma，17，senior high school student Ever since I was little，I've been larger than other girls.For a long time，this really bothered me.People would stare at me because I was “big” and I hated the way I looked.My anxiety drove me to try every means possible to lose weight，including dieting and weight-loss pills，but this brought me nothing but pain and poor health.Everything changed when one day I came across the UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 success story of a plus-size model，Tess Holliday.Although she's larger than most other models，she's really attractive and has the confidence to be herself—even in an industry full of beauty stereotypes.Her story changed my ideas about ❽what it means to be beautiful．I realised that my health，mental and physical，is the most important thing.Now I exercise a couple of times a week but just to keep fit.I mean，isn't it better that I'm large and happy，instead of skinny and unhealthy? UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ❽what引导宾语从句，作介词about的宾语。其中what在从句中作means的宾语；it为形式主语，真正的主语是动词不定式to be beautiful。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Dr Hart says： I completely agree with Emma—being healthy is beautiful，and we should wear that beauty with confidence.❾What I really admire is the way she has acknowledged that good health not only makes us more beautiful，but happier，too! UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ❾句中What引导主语从句；“she has acknowledged ...but happier，too”是定语从句，修饰先行词the way，其中that引导宾语从句，作acknowledged的宾语。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ◆难词注解 ①psychologist n．[C]心理学家 psychology n．[U]心理，心理过程；心理学 social/child psychology社会/儿童心理学 ②accounting n．[U]会计(职业) accountancy n．会计工作；会计职业 accountant n．会计师 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ③put vt.(以某种方式)说，表达 put it表达，表述 as ...puts it就如……所说 ④plain-looking adj.相貌平平的 ⑤enlarge vt.& vi.(使)增大；扩大 ⑥addicted adj.入迷的 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ⑦boost vt.促进，推动 boost one's confidence增强某人的信心 boost profits/yields提高利润/产量 ⑧a lack of self-confidence缺乏自信 lack n．[U] & vt.缺乏 a lack of sth.＝lack sth.缺乏某物 ⑨a desire for attention渴求关注 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 present vt.(以某种方式)展现；表现 present a modern image展现一个现代的形象 ⑪obtain vt.(尤指经努力后)获得；赢得 ⑫pretend vt.& vi.假装，装作 pretend to be ...假装是…… ⑬tend to do sth.倾向于做某事，往往会做某事 ⑭misjudge vt.对(人或情况)判断错误 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ⑮identical adj.完全相同的；非常相似的 be identical to/with ...与……完全相同 ⑯dormitory n．寝室 ⑰roommate n．(尤指大学里的)室友 mate n．同伴，同事，一同居住的人[常用于构成复合词，如workmate(工友)，teammate(队友)等。] ⑱register sb.for ...给某人报名参加…… UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ⑲from head to toe从头到脚 ⑳makeover n．[C，U](以新衣服、新发型等进行的)打扮，装扮 perceive vt.注意到；意识到；察觉到 external beauty 外在美 inner beauty内在美 overlook vt.忽视，忽略 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 bother vt.& vi.(使)苦恼 bother sb.某事困扰某人 bother about麻烦…… bother with打扰；麻烦 stare vi.盯着看 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 drive vt.迫使，驱使 drive sb.to do sth.迫使/驱使某人做某事 nothing but只有，只是，仅仅 ►I want nothing but the best for my children.我只是想给我的孩子们最好的。 attractive adj.(人)有魅力的 skinny adj.极瘦的，皮包骨的 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Ⅱ.文本理解 ►文章架构 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ►细节探究 1．Why does Jade's father consider her a narcissist？(　　) A.She treats herself as a pretty girl. B.She is addicted to editing her selfies. C.She likes commenting online selfies. D.She uses selfie apps to look plain. UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 2．What is Dr Hart's attitude towards obsessive online photo editing？(　　) A.Supportive. B．Unclear. C.Disapproving. D．Unconcerned. 3．What can we learn about Anthony according to the passage？(　　) A.Anthony used to think that external beauty is not important. B.Anthony used to like making up very much. C.Anthony used to watch the programme A New You. D.Anthony used to be confident about his appearance. UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 4．What makes Emma realise being healthy is the most important thing？(　　) A.Her poor health. B.Dr Hart's advice. C.The story of Tess Holliday. D.What Tess Holliday says. UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 5．What is the passage mainly about？(　　) A.What is inner beauty. B.The true meaning of beauty. C.External beauty can't be overlooked. D.Inner beauty is more important than external beauty. 答案：1～5 BCACB UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ►课文语法填空 Jade，an accounting manager，is a plain-looking girl but loves to look good.After finding selfie apps which can make a person more beautiful，she was addicted to them.By 1._______(edit) her selfies，posting them and eagerly checking 2.________(comment)，she improved her confidence.Though 3.__________(consider) a narcissist by her father，she doesn't care because her edited photos don't do harm to others. editing comments considered UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Anthony，a college student who never cared about his appearance，didn't understand why his sister is puzzled at which lipstick 4.______(use) since she has 17 lipsticks.He made his college roommates confused，for he always wore the same clothes.Last month，his roommates 5.__________(register) him for a TV programme 6._____ he was reviewed from head to toe.After that，he realised that external beauty isn't 7._______(total) worthless.By dressing well，you can make a good impression on others. to use registered where totally UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Emma is a senior high school student.Being“big”，she was always being stared 8.__ by others.Though trying many means to lose weight，she failed.But when she saw 9._ plus-size model，Tess Holliday，who is 10.______(large) than most other models but has the confidence to be herself，she changed her ideas about beauty.She realised that the most important thing is her health，mental and physical.Now she exercises just to keep healthy. at a larger UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Ⅲ.教材熟词生义/一词多义 1．overlook ①The economic impact of the arts is often overlooked and badly judged._____________________ ②We could not afford to overlook such a serious bad behaviour. ________________________________ ③Our garden is overlooked from the neighbour's balcony.__________ ④She's been overlooked for promotion several times.________ 未注意到；忽视，忽略 (对不良现象等)不予理会，视而不见 俯视；眺望 不予考虑 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 2.acknowledge ①He unwillingly acknowledged having made a mistake.____ ②We must acknowledge his letter as soon as we receive it.________ ③They wish to acknowledge the assistance of the police in the making of this film.__________ 承认 告知收到 鸣谢，感谢 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 Ⅳ.教材续写积累 1．心理描写——“奇怪、惊讶” ①It felt bizarre at first. ②But I was surprised at how good I looked after the makeover! [仿写]完成句子 ①当她说她要辞职时，我感到很奇怪。 I _________________ when she said that she would resign. ②我很惊讶，她拒绝了我的邀请。 I ________________ that she turned down my invitation. felt very bizarre was so surprised UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 2．心理描写——“想、认为、意识到” ①Dad thinks I am a narcissist，but what I say is that my pictures aren't hurting anyone，so who cares? ②At that moment，I perceived that external beauty isn't totally worthless. UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [仿写]完成句子 ①我意识到他会生气，所以我没有告诉他这个消息。(perceive) I ___________________________，so I didn't tell him the news. ②我想他可能饿了，就准备了许多好吃的。(think) I __________________________，so I prepared many delicious things. perceived he would be angry thought he might be hungry UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 互动探究·精研核心知识 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [要点突破] ①boost to提高到 boost sales增加销售额 boost one's confidence增强某人的信心 ②a boost in ……的增加 a boost to对……的促进 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [写作佳句] (2024·北京卷)And when people started clapping，that gave me a boost of confidence. 然后人们开始鼓掌，这增强了我的信心。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [学以致用] 单句填空/完成句子 ①The total was boosted __ nearly ￡200 by donations from parents. ②With more cyclists on the roads，there has been a boost __ bike sales over the past few months. ③No doubt，aid will be defended as _ boost to global influence. ④我们需要休假以提振精神。 We need a holiday to _________________． to in a boost our spirits UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [要点突破] ①lack n．缺乏 a lack of food/skills缺乏食物/技能 for lack of因缺少…… ②lack v．缺乏 lack sth.缺乏；没有 lack of缺乏；不足 lack for sth.缺乏；不充足；需要某事物 ③lacking adj.缺少的；不足的 be lacking in sth.不足；没有；缺少 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [写作佳句] Hard work can make up for lack of intelligence. 勤能补拙。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [学以致用] 单句填空/完成句子 ①Later，he worked in Africa，where many people suffered from blindness ___ lack of proper treatment. ②_ lack of qualifications can be a major obstacle to finding a job. ③_______(lack) manure and water，crops won't grow well. ④我觉得跟缺乏幽默的人聊天很乏味。 I find it quite boring to chat with those who ___________________ humour. for A Lacking are lacking in/lack UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [要点突破] pretend (not) to do sth.假装(没)做某事 pretend to be doing sth.假装正在做某事 pretend to have done sth.假装做了某事 pretend (to sb.)＋(that)从句 (对某人)假装…… [写作佳句] She pretended to be doing her homework when the teacher came in. 老师进来的时候，她假装正在做作业。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [学以致用] 单句填空/句式升级 ①We should never pretend _______(know) what we don't know. ②The boy was sitting at the desk，pretending _____________(work) hard when his mother got home. ③I passed by Joan quickly without greeting her，pretending __________(not see) her. ④The worker pretended that he had finished the work. →The worker __________________________ the work. to know to be working not to see pretended to have finished UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [要点突破] (be) identical in在……方面是相同的 (be) identical with/to和……完全相同；和……一致 identical twins同卵双胞胎；一模一样的双胞胎 [写作佳句] The fingerprints of all individuals，even identical twins，are unique. 每个人的指纹都是独一无二的，就算是同卵双胞胎也是如此。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [学以致用] 单句填空/完成句子 ①This knife is identical _______ the one used in the attack. ②The two words are in effect identical __ meaning. ③不同的电子制表软件包往往很相似，虽然不一定完全相同。 Different spreadsheet packages tend to be similar，________________________________． to/with in though not necessarily identical UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [要点突破] ①bother sb.with/about sth.以某事打扰某人 ②bother vi.& vt.费心(一般用于否定句和疑问句) not bother with/about ...不为……而费心 not bother doing/to do sth.不费心做某事；懒得做某事 Why bother doing ...？何必麻烦做……？ ③It bothers/bothered sb.＋that ... ……使某人烦恼。 ④put sb.to any bother给某人找麻烦 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [写作佳句] Sometimes it seems to bother the teacher that all the students are being too quiet. 有时，所有的学生都太安静了，这似乎使老师感到烦恼。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [学以致用] 单句填空/完成句子 ①I didn't want to put you __ any bother. ②__ really bothered me that he'd forgotten my birthday. ③Don't bother _________(invite) the talented performer，because the activity was cancelled. ④我小睡的时候不要打扰我。 _______________ while I am taking my nap. to It to invite Don't bother me UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [要点突破] ①acknowledge sth.承认某事 acknowledge sb./sth.to be/as ...承认某人/某物是…… acknowledge that ...承认…… It's generally/universally acknowledged that ...大家公认…… ②acknowledg(e)ment n．承认；感谢；谢礼 [写作佳句] All applications will be acknowledged. 所有的申请都将得到复函告知收悉。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [学以致用] 单句填空/一句多译 ①She is acknowledged _____ (be) one of the best writers in the world. ②I was sent a free copy in _________________(acknowledge) of my contribution. to be acknowledg(e)ment UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 ③He acknowledged ____ he had been at fault. ④人们普遍认为她是世界最佳网球手。 →She ______________________________________ in the world.(acknowledge ...as) →______________________________ she is the best tennis player in the world.(形式主语) that is widely acknowledged as the best tennis player It is widely acknowledged that UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [情境探究] ①He's aiming at first place.That is why he has been studying so hard. 他瞄准了第一名。那就是他一直在努力学习的原因。 ②This is because you don't have a valid security certificate. 这是因为您没有有效的安全证书。 ③He failed the exam again.The reason was that he was too careless. 他考试又不及格，原因是他太粗心了。 UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [要点突破] ①That/This/It is why ...那/这就是……的原因。(why引导表语从句，其后接某事造成的结果) ②That/This/It is because ...那/这是因为……(because引导表语从句，其后接某事产生的原因) ③The reason is that ...原因是……(that引导表语从句，解释原因的内容) UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 [学以致用] 单句填空/完成句子 ①Jack didn't take part in the sports meeting.That was _______ he fell ill suddenly. ②That's ___ I have a membership at the co-working space across the street—so I can focus. ③那就是他没来参加你的聚会的原因。 That is the reason ________________________________． Because why why he didn't come to your party UNIT 1　Face values 英语　选择性必修　第三册　W 返回导航 76 课时梯级训练(一) 谢 谢 形容词加前缀en-构成动词，前缀en-表示“使；使成为；造成；使处于……境地(或状态)”。 large→enlarge　danger→endanger rich→enrich　close→enclose Ⅰ.原文释译 It's all about ME! “Me”．It's a small word with big meaning，and that meaning is as individual to each of us as the way we look.Through interviews，I was able to discover ❶what “me” means to other people，and how they have learnt to appreciate the beauty in themselves． Psychologist①，Dr Hart 1 boost v．促进，推动n.增加，促进，激励 Each “like” boosts my confidence. 每一个“赞”都能增强我的自信。 2 a lack of缺乏 Obsessive online photo editing indicates a lack of self-confidence and a desire for attention. 沉迷于在线修图的行为表明缺乏自信并渴求关注。 3 pretend v．假装，装作；自认为 People who pretend to be someone they are not tend to misjudge themselves. 那些把自己包装成别人的人只会对自己产生错误的判断。 4 identical adj.完全相同的；非常相似的 I only used to have five identical pairs of trousers and five identical shirts. 我以前只有五条一模一样的裤子和五件一模一样的衬衫。 5 bother v．(使)苦恼；打扰，烦扰 n．麻烦；困难；令人烦恼的情况(或事物、人) For a long time，this really bothered me. 在很长一段时间里，这着实让我感到困扰。 6 acknowledge v．承认(某事属实或某情况存在)；告知收悉 What I really admire is the way she has acknowledged that good health not only makes us more beautiful，but happier，too! 我真正欣赏的是她承认健康的身体不仅使我们更美丽，还使我们更快乐！ ①表示“承认做了某事”时，acknowledge后可接动名词，也可接that从句，但通常不接动词不定式。 ②acknowledge后虽不能接不定式作宾语，但可用动词不定式作宾语补足语。 That's why ... 那就是……的原因。 That's why I could never understand my sister，who has 17 lipsticks and can't decide which one to use every morning. 那就是我永远无法理解我姐姐的原因，她有17支口红，每天早上都拿不定主意该用哪一支。 $$