人教版高中英语必修一Unit1知识点详解
高中英语 人教版必修一unit1 知识要点整合
Unit1知识要点整合一、重点单词1.volunteer n.志愿者vt./vi 自愿做，志愿adj.志愿的自愿、无偿做某事volunteer to do sth2.debate. n.辩论、争吵vi / vt辩论、争吵argue指提出理由或证据为自己或自己一方的看法或立场辩护，着重说理、论证和企图说服。
debate侧重指意见等对立的双方之间正式或公开的争辩。
discuss最常用词，指就某一或某些问题表明观点、看法等，以便统一认识，解决问题。
reason指据理力争以说服对方或求得对问题作更深入的研究。
3.prefer v.更喜欢（perfers—perferred—preferring ）preference n. 偏好(1)比起A更喜欢B prefer A to B(2)比起做A事更喜欢做B事prefer doing A to doing B(3)比起做A事，更愿意做B事prefer to do sth rather than do sth(4)更喜欢做某事，更愿意做某事prefer to do sth(5)”宁愿```”虚拟，表示对将来的期待prefer that sb (should ) do sth“宁愿```”虚拟，表示与现实相反用法同wish4.movement n.动作，运动，活动move v. 移动moved adj. 感人的moving adj. 令人感动的5. suitable adj.适合的suit v. 适合be suitable for 对···合6.actually adv.的确地actual adj. 的确的7.challenge n.挑战vt.向```挑战8.confusing adj.令人困惑的confused adj.感动困惑的confuse v.使···困惑confusion n..困惑8. fluent adj.流利的fluency n.流利；(1)在```很流利be fluent in9.graduate v.毕业n.毕业生graduation n.毕业(1)从```毕业__graduate from10. recommend v. 建议recommendation n.建议(1)向某人推荐、介绍``` recommend sth to/with sb(2)推荐某人做``` recommend sb for ```(3)推荐某人为``` recommend sb as ```(4)推荐某物做``` recommend sth for ```(5)建议做``` recommend doing ```(6)建议某人做``` recommend sb to do ```(7)建议``` recommend that sb (should ) do ```“一坚持，二命令，三建议，四要求”---insist/order/command/advise/suggest/recommend/ask/require/request/demand 11.advance n.进步v. 推动advanced adj.先进的，高级的in advance 事先，提前in advance of 在……前面，超过，比……进步on the advance 在上涨12.obviously adv.显然地obvious adj.显然的13. responsible adj.有责任的responsiblity n. 责任(1)对```负责___be responsible for_____14. editor n.编辑edit v.编辑15.schedule n. 工作计划，日程安排v.安排，预定(1)按时__on schedule(2)提前__ahead of schedule16.expert vi担任专家；n.专家adj.熟练的，内行的(1)在```上很内行__be expert in /be an expert in 17. behavior n.行为、动作behave v.行为17.attract v.吸引attraction n.吸引力attractive adj.有吸引力的(1吸引至```___attract to(2)吸引注意力___attract one’s attention19. addict vt. 使上瘾n.瘾君子addiction n. 上瘾addictive adj. 使人上瘾的addicted n. 上瘾的(1)对``上瘾be addicted to _20. wealth n. 财富wealthy adj. 富有的二、重点短语1. enjoy doing 喜欢做某事2. make all the difference 改变一切，大不相同3. clean up 打扫4.sign up签约sign up for 报名参加、注册5.on one’own 独自6.hand out 分发7. in the community 在社区中8. be used to doing sth 习惯于做某事9.keep up with追赶10. be prepared for 准备好```11. do well in 在```做得好12. try out for 参加```的选拔13.practice doing 练习做某事14. make the team 组队15. make a fire 生火16. learn sth from sb向某人学习```17. give a speech 做演讲18. get started 开始19. have fun 玩得开心20. focus on 集中注意力在21. encourage sb to do sth 鼓励某人做某事22. feel lonely 感到孤独23. in a good order 井然有序地24. quit doing 放弃做某事25. work out 算出，解答出26. drop out of school 辍学27. be grateful to sb for sth 对某人做某事表示感激28. be pleased to do sth 很高兴做某事29. introduce sb to sb 把某人介绍给某人30. aim to 目的在31. be the same as 和```一样32. be similar to 和```相似33. agree with sb/sth 同意某人/某事三、重点句型1. since 因为I am sure he will listen to you, since you are his good friend.2.be+adj+to dothe handwriting is easy to read.。
人教版高中英语必修1unit1课文知识点详解
归纳总结 add v.增加，添加；补充说。 add up sth./add sth.up把……加起来 add up to加起来共计/达（不用于被动语态） add to增加，增添（后多接抽象名词） add...to...把……加到/进……里 add that...补充（说）…… 即学即用 His returning home safe and sound adds to her pleasure (使她倍感欢喜).
I’m not concerned with that matter any longer. 我和那件事再也没有关系了。 He called on all concerned to take an active part in the movement. 他呼吁所有有关的人积极地参与这场运动。 归纳总结 concern n.［U］关心，担忧；［C］关心的人（或） 事；vt.涉及，关系到，参与；(使)担心，(使)操心。 be concerned with sth.和……有关 be concerned about sth.担心/关心某事
(为此事烦恼). （2）Don’t upset yourself about it (你别为这
事烦恼了) —let’s jusern
You will tell your friend that you are concerned about him/her and you will meet after class and talk then.(回归课本P1) 观察思考 There is now considerable concern for their illness. 现在（人们）对他们的病情相当担心。 She is always concerning herself about other people’s business. 她总是关心别人的事情。
人教版高中英语必修一Unit1知识点讲解
Unit 1 FriendshipNew words:1.add up合计vt. &vi.①a dd up to + No. 总计为Eg: The numbers add up to exactly 666.数字加起来正好是666. vt.Add up all the money I owe you. vt.Eg: The waiter can’t add up. 他不能算账vi.②a dd up....增添The words add up to myself confidence. 你的话语增添了我的信心/自信。
③a dd ..... to .....Eg: Please add the tea to the milk. 把茶加到牛奶里去。
2. ignore vt. 不理睬；忽视means pay no attention to sb/sth on purpose.故意假装不理睬某人Eg：you can not avoid ignoring my advice on how to study English.你耽误不起忽略我的关于英语学习的建议。
She ignored him and carried on with her works. 她假装没看见他，忽略了他，继续做着她手头上的工作。
3. upset adj. 心烦意乱的；不安的；不适的；vt. 使不安；使心烦adj. be upset about : means be unhappy with something and be disappointed Eg: Your parents are upset about your poor grades. 你的父母亲对你的成绩感到非常的难过和不开心。
be upset that + 从句Eg: She was upset that he had left without a kiss.an upset stomach: means your stomach is uncomfortablevt. upset upsettingEg: Your action upset/annoyed me. 你的行为使我很恼火，很恼怒。
高中英语新人教版必修第一册 Unit 1Teenage Life教材知识解读
高中英语必修一Unit1知识解读一、基础知识【阅读单词】1.ballet n.芭蕾舞2.greenhouse n.温室；暖房3.freshman n.(大学或高中)一年级新生4.literature n.文学；文学作品5.extra-curricular adj.课外的；课程以外的6.plate n.盘子；碟子7.youth n.青年时期；青春8.generation n.一代(人)9.adult n.成年人adj.成年的；成熟的【重点单词】1.debate n.辩论；争论vt.& vi.辩论；争论2.content n.内容；[pl.]目录；(书、讲话、节目等的)主题adj.满意的，满足的3.title n.(书、诗歌等的)名称；标题；职称；头衔4.topic n.话题；标题5.extra adj.额外的；附加的6.obviously adv.显然；明显地7.quit vi.& vt.(quit，quit)停止；戒掉；离开(工作职位、学校等)8.schedule n.工作计划；日程安排vt.安排；预定9.adventure n.冒险；奇遇10.expert n.专家；行家adj.熟练的；内行的；专家的11.focus vi.& vt.集中(精力、注意力等)；(使)调节焦距n.中心；重点；焦点【拓展单词】1.teenage adj.十几岁的(指13至19岁)；青少年的→teenager n.(13至19岁之间的)青少年2.volunteer n.志愿者→voluntary adj.志愿的；自愿的3.prefer vt.较喜欢(preferred；preferred；preferring)→preference n.偏爱；优先；偏爱的事物/人4.movement n.动作；运动；活动→move vt.& vi.移动；搬家vt.使感动5.suitable adj.合适的；适用的→suit vt.适合；适宜于n.套装，西装6.actually adv.事实上；的确→actual adj.实际的；真实的7.challenge n.挑战；艰巨任务vt.怀疑；向……挑战→challenging adj.有挑战性的8.confuse vt.使糊涂；使迷惑→confusing adj.难以理解的；不清楚的→confused adj.糊涂的；迷惑的→confusion n.混乱；混淆9.fluent adj.(尤指外语)流利的；熟练的→fluently adv.流利地→fluency n.流利；流畅10.graduate vi.& vt.毕业；获得学位n.毕业生→graduation n.毕业11.recommend vt.建议；推荐；介绍→recommendation n.建议；推荐12.advance n.前进；发展vi.前进；发展vt.发展；促进→advanced adj.高级的；高等的；先进的13.responsible adj.负责的；有责任的→responsibly adv.负责地；有责任地→responsibility n.责任；义务14.solution n.解决办法；答案→solve vt.解决15.editor n.主编；编辑；编者→edit vt.编辑；剪辑→edition n.版本；版次16.survival n.生存；幸存；幸存事物→survive vi.& vt.幸存；比……活得长→survivor n.幸存者17.behaviour n.行为；举止→behave v.举止，表现18.attract vt.吸引；引起……的注意(或兴趣)→attraction n.吸引；吸引人的事物→attractive adj.有吸引力的19.addict n.对……入迷的人；吸毒成瘾的人→addicted adj.上瘾的；入迷的→addiction n.着迷；上瘾【高频词汇】1.accessible adj.易接近的；随和的2.accompany vt.陪伴；伴奏3.accomplish vt.完成；实现4.account n.账目；描述；理由5.accumulate v.积累；积聚6.accurate adj.精确的7.achievement n.成就8.adaptation n.适应；改编Ⅳ.背核心短语1.prefer...to...喜欢……多于……2.clean up打扫(或清除)干净3.suitable for对……适合的4.sign up (for sth)报名(参加课程)5.be responsible for对……负责6.be attracted to喜爱7.focus on集中；特别关注8.addicted to对……很入迷9.on one’s own独立地，独自地10.hand out分发【经典句式】1.My adviser recommended that I should sign up for advanced literature because I like English and I’m good at it.[recommend that sb (should) do sth] 我的指导老师建议我选修高级文学，因为我喜欢英语，而且我很擅长它。
人教版高一英语必修一Unit1知识点详解
人教版高一英语必修一Unit1知识点详解一、单词1、重点单词讲授。
(1)add① add …to…把…添加…/把…加起来② add up to共计，总共③ add to增加(2)upset过去式：upset过去分词：upset现在分词：upsettingadj.心烦意乱的，不安的，不适的be upset about/over 为某事心烦、不安be upset that心烦vt.使不安，使心烦It upsets sb that让某人心烦的是It upsets sb to do sth 做某事使某人不安(3)concernvt. 使担忧，顾虑，触及，关系到n. 担忧，关注，利害关系①as far as sb/sth + be concerned就某人而言，对于某人来说as far as I am concerned就我而言，对于我来说as far as he is concerned对他来说as far as English is concerned关于英语，对于英语②be concerned about/f or关心，挂念have no concerned about/for③be concernedin/with触及到，与…有关have no concerned in/with(4)go through①经历，遭受，忍受go through one difficulty after another.经历一个又一个困难。
②仔细检查，审查go through your paper 检查你的试卷。
③浏览，翻阅go through all the related reference.浏览相干资料。
④通过，穿过=pass throughgo through a great forest.穿过一片大森林。
⑤完成go through the task.完成任务。
(5)suffer①suffer 作“遭受”时，后面直接接pain, loss, injury, harm或punishment.②suffer 作“受…苦”时，常常搭配：sufferfrom(6)get/be tired of厌烦…get/be/feel tired of sb / sth / doing sth 厌烦be tired from由于…而疲劳(体力上的疲劳)，侧重原因be tired out精疲力竭的(7)join in 参加，加入区分join ,join in ,attend 与 take part in：join：多指加入组织，团体，党派等，有作为其中一员的意思。
2023年人教版高一英语必修一Unit1知识点详解
高一英语必修1 Unit 1 FriendshipPart 1. Warming up1.介词不一样，含义有别：be good to sb./sth. 对… 好be good for sb./sth. 对… 有好处be good at (doing) sth. 擅长，精通be good with sb./sth. 善于应付… 旳eg. She was very good to me when I was ill.Doing morning exercises is good for health.Tim is good at speaking English.He is very good with children. 他对孩子很有一套。
2.add up 合计，把…加起来add up to 合计到达…add to 增长，增添add A to B 把…加进…里面，把…和…相加eg. Please add these figures up.These figures add up to 900.The bad weather added to our difficulities.Please add some salt to the water.Add three to four and you get seven.▲ add vt. 补充说（后接that从句或者直接引语）eg. He added that they would return in a week.“And don’t be late,”she added.3.point n.点，要点，观点，意义，得分v.指着be on the point of doing sth. when......=be about to do sht. when....正要做某事，这时......There is no point (in) doing sth. 没有必要（意义）做某事4. until与not … untiluntil表达动作、状态旳持续，强调“一直到……为止”，或强调某个动作或状态一直持续到另一种动作或状态出现之前。
人教版高中英语必修一 Unit1 重难点知识归纳总结
人教版高中英语必修一Unit 1【重点单词】1.survey ['səːveɪ] n. 调查；测验2.upset [ʌp'set] adj. 心烦意乱的；不安的；不适的vt. 使不安；使心烦3.ignore [iɡˈnɔ:] vt. 不理睬；忽视4.calm [kɑ:m] vt. & vi. （使）平静；（使）镇定adj. 平静的；镇静的；沉着的5.concern [kənˈsə:n] vt. （使）担忧；涉及；关系到n. 担心；关注；（利害）关系6.loose [lu:s] adj. 松的；松开的7.German [ˈdʒɜ:mən] adj. 德国的；德国人的；德语的；n. 德国人；德语8.series [ˈsiəri:z] n. 连续；系列9.outdoors [ˈautdɔ:z] adv. 在户外；在野外10.spellbind [ˈspelˌbaɪnd] vt. 迷住；迷惑11.dusk [dʌsk] n. 黄昏；傍晚12.thunder [ˈθʌndə] vi. 打雷；雷鸣n．雷；雷声13.entire [inˈtaiə] adj. 整个的；完全的；全部的14.power [ˈpauə] n. 能力；力量；权力15.curtain [ˈkə:tn] n. 窗帘；门帘；幕布16.dusty [ˈdʌsti:] adj. 积满灰尘的17.partner [ˈpɑ:tnə] n. 伙伴；合作者；合伙人18.settle [ˈsetl] vi. 安家；定居；停留vt. 使定居；安排；解决19.suffer [ ˈsʌfə] vt. & vi. 遭受；忍受；经历20.loneliness [ˈləʊnlɪnɪs] n. 孤单；寂寞21.recover [riˈkʌvə] vi. & vt. 痊愈；恢复；重新获得22.pack [pæk] vi. & vt. 捆扎；包装；打包行李n. 小包；包裹23.suitcase [ˈsju:tkeis] n. 手提箱；衣箱24.teenager [ˈti:neidʒə] n. 十几岁的青少年25.gossip [ˈɡɔsip] vi. & n. 闲话；闲谈26.exactly [ɪg'zæk(t)lɪ] adv. 确实如此；正是；确切地27.disagree [dɪsə'griː] vi. 不同意28.grateful [ˈɡreitful] adj. 感激的；表示谢意的29.dislike [dɪs'laɪk] n. & vt. 不喜欢；厌恶30.tip [tɪp] n. 提示；技巧；尖；尖端；小费vt. 倾斜；翻倒31.secondly ['sek(ə)ndlɪ] adv. 第二；其次32.swap [swɔp] vt. 交换33.item [ˈaitəm] n. 项目；条款【重点短语】1.be good to 对……友好2.add up 合计3.get sth done 使某物被做4.calm down 镇定下来5.have got to 不得不6.be concerned about 关心；挂念7.make a list of 列出8.share sth with sb 和某人分享某物9.go through 经历；仔细检查10.hide away 躲藏；隐藏11.set down 放下；记下12.a series of 一系列；一套13.be crazy about 对……着迷14.on purpose 故意15.in order to/ so as to 为了16.face to face 面对面地17.according to 按照；根据……所说18.get along with 与……相处19.pack up 收拾，打理行装20.have trouble with sb/sth 同某人闹意见；做某事有困难21.fall in love 相爱22.try out 试验；试用23.join in 参加（活动）municate with sb 和某人交流25.look to sth 注意/留心某事26.cheat sb (out) of sth 骗取某人某物27.have the/a habit of doing ... 有做……的习惯28.be ignorant of 无知的；不知道【重点句型】1. It was the first time in a year and a half that I had seen the night face to face. （从句时态用完成时）这是我一年半以来第一次目睹夜晚。
人教版高一英语必修一Unit 1知识点总结
人教版高一英语必修一Unit 1知识点总结词汇表单词及相关变形1. teenage / ˈti:neɪdʒ/ adj. 十几岁的（指13至19岁）; 青少年的2. teenager / ˈti:neɪdʒə(r)/ n. （13至19岁之间的）青少年3. ballet /ˈbæleɪ/ n. 芭蕾舞；芭蕾舞剧4. volunteer /ˌvɒlənˈtɪə(r)/ n. 志愿者volunteer to do 自愿做。
5. debate /dɪ 'beɪt/ n．辩论；争论vt．& vi辩论；争论debate with sb about sth6. prefer / prɪˈfɜ:(r)/ vt. 更喜欢preference n 偏爱prefer…to…喜欢……多于…… shoe preference for 偏爱。
prefer doing…to doing喜欢……多于…… prefer to do A rather than do B…更喜欢做A……比起B……7. content / 'kɒntent / n.内容; [pl] 目录; （书、讲话、节目等的）主题adj 满意的be content with对。
满意8. movement / ˈmu:vmənt / n. 动作；运动; 活动move v运动9. greenhouse / ˈgri:nhaʊs/ n. 温室；暖房10. clean up 打扫（或清除）干净11. suitable /ˈsu:təbl/ adj. 适合的；适用的suit v 适合be suitable for 对……适合的12. actually / ˈæktʃuəli/ adv. 事实上; 的确actual adj13. challenge /ˈtʃæləndʒ/ n.挑战；艰巨任务vt. 怀疑；向……挑战challenging adj 有挑战的14. title /ˈtaɪtl/ n. （书、诗歌等的）名称；标题；职称；头衔15. topic / ˈtɒpɪk/ n. 话题; 标题16. freshman / ˈfreʃmən / n. （especially NAmE）（中学）九年级学生；（大学）一年级新生17. confuse /kən'fju:z/ vt. 使糊涂；使迷惑18.confusing /kənˈfju:zɪŋ/ adj.难以理解的；不清楚的19.confused /kənˈfju:zd/ adj. 人感到糊涂的；迷惑的20. fluent/'flu:ənt/ adj. （尤指外语）流利的；熟练的fluently adv流利地21. graduate /'ɡrædʒʊeɪt/ vi. & vt．毕业；获得学位/'ɡrædʒʊət/ n. 毕业生graduation ngraduate from（学校）graduate in（专业）22.recommend /ˌrekəˈmend/ vt. 建议；推荐；介绍recommend sb to do 建议某人做。
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高一英语必修1 Unit 1 FriendshipPart 1. Warming up1.介词不同，含义有别：be good to sb./sth. 对… 好be good for sb./sth. 对… 有好处be good at (doing) sth. 擅长，精通be good with sb./sth. 善于应付… 的eg. She was very good to me when I was ill.Doing morning exercises is good for health.Tim is good at speaking English.He is very good with children. 他对孩子很有一套。
2.add up 合计，把…加起来add up to 合计达到…add to 增加，增添add A to B 把…加进…里面，把…和…相加eg. Please add these figures up.These figures add up to 900.The bad weather added to our difficulities.Please add some salt to the water.Add three to four and you get seven.▲ add vt. 补充说（后接that从句或者直接引语）eg. He added that they would return in a week.“And don’t be late,”she added.3.point n.点，要点，观点，意义，得分v.指着be on the point of doing sth. when......=be about to do sht. when....正要做某事，这时......There is no point (in) doing sth. 没有必要（意义）做某事4. until与not … untiluntil表示动作、状态的持续，强调“一直到……为止”，或强调某个动作或状态一直持续到另一个动作或状态出现之前。
常与表示延续性动作的动词连用。
not … until表示“到……为止；直到……才”，常与表示瞬间性动作的动词连用。
eg. He lived with his parents until he graduated from college.The noise of the street didn’t stop until midnight.5. finish sth./doing sth. 后跟动名词作宾语的动词或短语还有：admit, appreciate, avoid，consider，delay, enjoy，escape, feel like, forgive, get down to, give up, imagine，mind, miss（错过）, practice, suggest, risk，can't stand（不能忍受）, can’t help (忍不住），give up, put off等。
help sb.(to) do sth.There is no way to escape doing the work. 没有办法逃脱做这项工作。
We shall appreciate hearing from you again. 能再次收到你的来信，我们将十分感激。
He put off paying the bills6. get sth. done 使某事被做( get做使役动词，“使、叫、让”后接复合宾语)eg. When are you going to get your hair cut?I must get my homework finished first before going out to play.He got his foot hurt while playing football.▲get sb. to do sth. 让某人做某事eg. I will get him to do the work.▲get sb./sth. doing…使某人或者某物开始…起来eg. Let me try now. I will get the car going. ▲get + n. + adj. 使… 成为某种状态eg. Get everything ready.★联想：have sth. done 使某事被做have sb. do sth. 让某人做某事have sb./sth. doing 使某人或者某物持续做某事“让某人做某事”的表达方法let /make/have sb. do sth. get sb. to do sth.7.Your friend comes to school very upset.upset 此处为adj. 做主语补足语，用来补充说明主语的情况。
Eg. He went to bed cold and hungry. She got married young.▲upset的用法：(1). adj. 心烦意乱的，不安的，不适的（多做表语）搭配：be upset about sth. 为某事烦心be upset that… 心烦eg. She was really upset about losing the money.I was upset that he had left without saying goodbye.(2). vt. 使不安，使心烦(upset, upset) upset oneself about sth 为某事烦恼Eg. Don’t upset yourself about it.The bad news upset the boy’s mother.8.ignore vt. 不理睬，忽视eg. He ignored my advice, so he failed in this exam.Alice saw Jack coming, but ignored him.ignorance n.无知ignorant adj. 不知道的，无知的be ignorance of/about sb./sth. 对某人/某物不知道eg. I was ignorant(of the fact)that the boss should be so strict. 我不知道老板居然那样严格。
9.calm down vt./vi. （使）平静下来，（使）镇定下来eg. The excited girl quickly calmed down.He took a deep breath to calm himself down.▲calm adj. 平静的，镇静的，沉着的eg. Keep calm.After the storm, it became calm again.▲adj. calm, quiet, still, silent辨析：calm 平静的，沉着的（指无风浪或者人的心情不激动）quiet 安静的，宁静的（指没有声音，不吵闹或者心里没有烦恼，忧虑）still 静止的，不动的（指没有运动或者动作的状态）silent 沉默的，不出声的（指没有声音或者不讲话）【一言辨异】When facing danger, you should keep calm; when taken photos of, you should keep still; when someone else is asleep, you should keep quiet; in class, you shouldn’t keep silent about the teacher’s questions.10.have got to 不得不，必须(否定：haven’t got to) = have to（否定：don’t have to)eg. I have got to go to a meeting.Have you got to go now?He hasn’t got to come tomorrow.【说明】:have got to 很少用于过去时态, have to 可用于各种时态；表示一次性动作时，两者可互换，表示习惯性动作，尤其句中有always, often 等时，应用have to.11.concern （1）vt. (使)担忧，涉及，关系到eg. She concerns herself abou t her son’s future.The news concerns your brother.▲concern 做动词时，更多情况下用过去分词做表语。
搭配：① be concerned about/for sth. 为… 担心，关心，关注，挂念② be concerned with sth. 与…有关，涉及③ as/so far as sb. be concerned 就某人而言Eg. The family are all concerned about her safety.He was concerned with the matter.As far as I am concerned, I don’t agree with you.(2) n. [u]/[c] 担心，挂念，关注，利害关系；关心的事Eg. show/express/feel/have concern about/for… 关心…with concern 关心地At that time, one of his concerns was to go to college.12.go on holiday 去度假take care of = look after = care forwalk the dog 遛狗13.While walking the dog, you were careless and it got loose…(1). While walking the dog = While you were walking the dog是一个由while引导的省略的时间状语从句。
【点拨】在when/while引导的时间状语从句，where引导的地点状语从句，if/unless/once 引导的条件状语从句，as/as if引导的方式状语从句，though/although/even if引导的让步状语从句中，若主从句主语相同，且从句谓语动词含有be动词的某种形式，则从句的主语和be 动词可以省略；或者当从句主语为it，且从句谓语动词含有be动词的某种形式，这时省略it和be动词。