Unit 1 课时5 Section B 3a-3c（知识清单）英语新教材人教版九年级上册

该初中英语知识清单围绕“变化的世界”主题，系统梳理Unit 1 Section B 3a-3c核心词汇、短语及语法考点。从必背词汇如junior、flat，到关键短语be different from、used to do sth.，再通过例句解析now that、own等语法点，最终提炼三大必背句型，构建从基础积累到写作应用的学习支架。 知识链路以主题语境为依托，按“词汇-短语-语法-句型”逻辑递进。每个考点配备词形变换、固定搭配及中考例句，通过对比表格区分易混点，即学即练强化应用。注重语言能力培养，通过对比分析提升思维品质，助力学生掌握科学学习方法，提升学习效率。

Unit 1 The Changing World Section B 3a-3c 核心知识梳理 一、必背词汇 学科网（北京）股份有限公司1 / 11 学科网（北京）股份有限公司 1.低年级的；初级的（形容词）：junior 2.公寓（名词）：flat 3.讨论（名词）：discussion 4.方面（名词）：aspect 5.既然：now that 6.与…… 不同：be different from 7.过去常常做某事：used to do sth. 8.某人自己的：one’s own 9.能够做某事；有机会做某事：get to do sth. 10.对…… 有信心：be confident in… 11.参加小组讨论：attend group discussions 12.喜欢做某事：enjoy doing sth. 1.低年级的；初级的（形容词）：___________ 2.公寓（名词）：___________ 3.讨论（名词）：___________ 4.方面（名词）：___________ 6.与…… 不同：_____________ 7.过去常常做某事：_____________ 8.某人自己的：_____________ 9.能够做某事；有机会做某事：_____________ 10.对…… 有信心：_____________ 11.参加小组讨论：_____________ 12.喜欢做某事：_____________ 二、必会考点 学科网（北京）股份有限公司2 / 11 学科网（北京）股份有限公司 1.Now that I am older, my life is different from when I was in primary school.既然我长大了，我的生活和小学时代已经不一样了。 （1）now that conj.既然 【知识点拓展】 必考固定搭配：now that 引导原因状语从句，“既然；由于” 中考典型例句：Now that you have finished your homework, you can go out to play. 既然你已经完成作业，你就可以出去玩。 （2）different adj.不同的 【知识点拓展】 词形变换：difference n. 差异，不同；differently adv. 不同地 必考固定搭配：be different from 与…… 不同 中考典型例句：My hobby is different from my brother’s. 我的爱好和我哥哥的不一样。 单词 / 短语 含义 核心区别 例句 be different from 与…… 不同 强调两者之间存在差异 This book is different from that one. be the same as 与…… 相同 强调两者一致，和 be different from 互为反义短语 Your bag is the same as mine. 单词 含义 例句 different adj. 不同的，作表语、定语 There are different kinds of books. difference n. 不同、差异，名词 There are many differences between us. （3）primary adj.初级的 【知识点拓展】 词形变换：primarily adv. 主要地 必考固定搭配：primary school 小学 中考典型例句：We learned many useful skills in primary school. 我们在小学学到很多有用的技能。 【即学即练】 1._______ (now that) you know the truth, you can share it with your classmates. 2.My ideas are _______ (different) from my sister’s. 3.There are many _______ (different) between our past life and present life. 4.When he was in _______ (primary) school, he was very shy. 5._______ (now that) we have grown up, our life becomes _______ (different) from before. 6.Many _______ (primary) schools have made great progress in education. 【参考答案】 1.Now that 2.different 3.differences 4.primary 5.Now that；different 6.primary 2.My family used to live in a small flat.我们家过去住在一套小公寓里。 used to过去常常 【知识点拓展】 词形变换：否定形式 didn’t use to /usedn’t to 必考固定搭配：used to do sth. 过去常常做某事（现在不再如此） 中考典型例句：I used to get up late on weekends. 我过去周末常常起得很晚。 短语 含义 核心区别 例句 used to do sth. 过去常常做某事 描述过去的习惯 / 状态，to 后接动词原形 He used to live in the countryside. be used to doing sth. 习惯于做某事 to 是介词，后接动名词 doing He is used to living in the city. be used to do sth. 被用来做某事 被动语态，表物品用途 Wood is used to make tables. 【即学即练】 1.My family _______ (use) to live in a small flat many years ago. 2.He _______ (use) to play computer games, but now he spends much time on study. 3.She didn’t _______ (use) to attend group discussions at school. 4.There _______ (use) to be few tall buildings in our hometown. 5.They _______ (use) to keep in touch by letters when they were young. 【参考答案】 1.used 2.used 3.use 4.used 5.used 3.She has her own room and her own TV set.她拥有属于自己的房间，还有属于她自己的电视机。 own adj.自己的 【知识点拓展】词形变换：own v. 拥有；owner n. 物主，所有者 必考固定搭配：one’s own + 名词 某人自己的…… ⚠中考高频易错：own 前面必须搭配形容词性物主代词；✅has her own room 中考典型例句：Every child hopes to have his own bedroom. 每个孩子都希望拥有属于自己的卧室。 单词 含义 核心区别 例句 own(adj.) 自己的 放在物主代词后，修饰名词；one’s own sth. This is my own pen. own(v.) 拥有 动词，作谓语，等同于 have He owns a big house in the town. 短语 含义 核心区别 例句 one’s own + 名词 某人自己的…… 强调归某人专属，物主代词不可省略 This is her own bike. of one’s own 属于某人自己的 后置修饰名词，放名词后面 This is a bike of her own. set n.（机器的）一台；装置 【知识点拓展】词形变换：复数 sets 必考固定搭配：TV set 电视机；a set of 一套…… 中考典型例句：There is an old TV set in the old house. 老房子里有一台旧电视机。 【即学即练】 1.The girl wants to have _______ (own) bedroom in the new house. 2.This is her _______ (own) TV _______ (set), and she likes it very much. 3.Many teenagers hope to have their _______ (own) mobile phones. 4.There are two old TV _______ (set) in that small flat. 5.He is the _______ (own) of this big house. 【参考答案】1.her own 2.own；set 3.own 4.sets 5.owner 4.I am glad that I get to see her every day.我很高兴我每天都能够见到她。 get v.得以；有机会 【知识点拓展】 词形变换：过去式 got；过去分词 got 必考固定搭配：get to do sth. 有机会做某事；得以做某事 中考典型例句：We get to visit the science museum this Saturday. 这周六我们有机会参观科学博物馆。 短语 含义 核心区别 例句 get to do sth. 有机会 / 得以做某事 强调有机会、有幸去做 I get to meet my favourite star. get used to doing sth. 习惯于做某事 to 为介词，后接动名词 He gets used to getting up early. get to + 地点 到达某地 后接地点名词 When will you get to the station? 【即学即练】 1.I _______ (get) to visit my best friend every week when I was young. 2.You will _______ (get) to take part in the group discussion tomorrow. 3.So far, we have _______ (get) many chances to communicate with each other. 4.When did you _______ (get) to the small flat last night? 5.She _______ (get) much help from her teachers in the past. 【参考答案】 1.got 2.get 3.got 4.get 5.got 5.I have become more confident in my studies and often attend group discussions.我在学习上变得更加自信，并且经常参加小组讨论。 （1）confident｜/ˈkɒnfɪdənt/｜adj.｜自信的 【知识点拓展】词形变换：confidence n. 自信心 必考固定搭配：be confident in… 对…… 有信心 中考典型例句：You should be confident in yourself when you take the exam. 考试的时候你应该对自己有信心。 （2）study｜/ˈstʌdi/｜n.｜学习；学业 【知识点拓展】词形变换：studies（复数，多指学业）；study v. 学习 必考固定搭配：in one’s studies 在学业方面 中考典型例句：He makes great progress in his studies. 他在学业上取得很大进步。 （3）attend｜/əˈtend/｜v.｜参加；出席 【知识点拓展】词形变换：过去式 attended；过去分词 attended 必考固定搭配：attend group discussions 参加小组讨论；attend school 上学 中考典型例句：All students will attend the important meeting next week. 所有学生下周都要参加这场重要会议。 单词 含义 核心区别 例句 attend 出席、参加 侧重到场；后接会议、讨论、学校 attend group discussions 参加小组讨论 join 加入 加入组织、团体，成为一员 join the music club 加入音乐俱乐部 take part in 参加 参与某项活动、比赛 take part in the sports meeting 参加运动会 （4）group｜/ɡruːp/｜n.｜小组；团体 【知识点拓展】词形变换：groups（复数） 必考固定搭配：group discussion 小组讨论；a group of 一群…… 中考典型例句：We finish the task in small groups. 我们以小组形式完成这项任务。 （5）discussion｜/dɪˈskʌʃn/｜n.｜讨论 【知识点拓展】 词形变换：discuss v. 讨论 必考固定搭配：have a discussion 进行讨论；group discussions 小组讨论 中考典型例句：We had a warm discussion about the topic. 我们围绕这个话题展开了热烈的讨论。 【即学即练】 1.He is becoming more _______ (confident) in his _______ (study). 2.Many students will _______ (attend) the _______ (group) discussions this afternoon. 3.We had a hot _______ (discuss) in our small _______ (group) yesterday. 4.She has _______ (attend) many different kinds of _______ (discuss) activities so far. 5.You should be _______ (confident) of yourself and improve your _______ (study). 【参考答案】 1.confident；studies 2.attend；group 3.discussion；group 4.attended；discussion 5.confident；studies 6.I enjoy studying with my friends.我喜欢和朋友们一起学习。 enjoy｜/ɪnˈdʒɔɪ/｜v.｜喜爱；享受 【知识点拓展】 词形变换：过去式 enjoyed；过去分词 enjoyed；enjoyable adj. 令人愉快的；enjoyment n. 乐趣 必考固定搭配： ① enjoy doing sth. 喜欢做某事（后接动名词，禁止接 to do） ② enjoy oneself 玩得开心 中考典型例句：Many students enjoy reading in their free time. 许多学生喜欢在空闲时间阅读。 单词 / 短语 含义 核心区别 例句 enjoy doing sth. 喜欢做某事 enjoy 后面只能接动名词 doing，❌enjoy to do I enjoy walking after dinner. like to do / like doing 喜欢做某事 like 两种形式均可，to do 侧重某次；doing 侧重爱好 I like swimming. 单词 含义 例句 enjoyable adj. 令人愉快的，修饰事物 We had an enjoyable trip. enjoyment n. 乐趣，快乐 Reading brings me much enjoyment. 【即学即练】 1.I really _______ (enjoy) studying with my classmates after class. 2.The girl enjoys _______ (walk) in the park in her free time. 3.They _______ (enjoy) the group discussion last week. 4.Most students have _______ (enjoy) taking part in different kinds of activities. 5.You can _______ (enjoy) the beautiful views with your friends. 【参考答案】 1.enjoy 2.walking 3.enjoyed 4.enjoyed 5.enjoy 7.It's amazing how much we have achieved together.我们共同取得这么多的成就，真是令人惊叹。 （1）amazing｜/əˈmeɪzɪŋ/｜adj.｜令人惊叹的 【知识点拓展】 词形变换：amaze v. 使惊奇；amazed adj.（人）感到惊奇的；amazement n. 惊奇 必考固定搭配：It’s amazing that… …… 真是令人惊叹 中考典型例句：It’s amazing that he finished the hard work in one day. 他一天就完成这份艰难的工作，真是令人惊叹。 （2）achieve｜/əˈtʃiːv/｜v.｜取得；实现 【知识点拓展】 词形变换：过去式 achieved；过去分词 achieved；achievement n. 成就 必考固定搭配：achieve one’s dream /goals 实现梦想 / 目标 中考典型例句：If you keep working hard, you will achieve your dream. 如果你坚持努力，你将会实现你的梦想。 （3）together｜/təˈɡeðə(r)/｜adv.｜共同；一起 【知识点拓展】 必考固定搭配：work together 共同努力；achieve together 共同取得成就 中考典型例句：We can finish the task better if we work together. 如果我们共同努力，就能更好地完成任务。 单词 含义 核心区别 例句 amazing adj. 令人惊叹的 修饰事物 The changes are really amazing. amazed adj. 感到惊奇的 修饰人 We are amazed at the great changes. 单词 含义 核心区别 例句 achieve(v.) 实现；取得 宾语常为 dream、goal、success He achieved his goal at last. realize(v.) 意识到；实现 侧重意识到，也可接 dream He realized his dream of being a teacher. 【即学即练】 1.It is _______ (amaze) that we have made so much progress. 2.If you work hard, you _______ (achieve) your dreams in the future. 3.We have _______ (achieve) great success when we work _______ (together). 4.All of us are _______ (amaze) at the great changes in our hometown. 5.We will stick to our goals and make them _______ (achieve) together. 【参考答案】 1.amazing 2.will achieve 3.achieved；together 4.amazed 5.achieved 三大必背句型（3a 原文原型，写作直接套用） 1.Now that I am older, my life is different from when I was in primary school. 既然我长大了，我的生活和我小学时代已经不一样了。 👉now that 既然，侧重已知事实；区别 because。 2.My family used to live in a small flat. 我们家过去住在一套小公寓里。 👉used to do sth. 过去常常做某事（现在不再） 3.It’s amazing how much we have achieved together. 我们共同取得这么多的成就，真是令人惊叹。 👉it 作形式主语；现在完成时 have achieved，强调从过去到现在的结果。 $Unit 1 The Changing World Section B 3a-3c 核心知识梳理 一、必背词汇 学科网（北京）股份有限公司1 / 11 学科网（北京）股份有限公司 1.低年级的；初级的（形容词）：junior 2.公寓（名词）：flat 3.讨论（名词）：discussion 4.方面（名词）：aspect 5.既然：now that 6.与…… 不同：be different from 7.过去常常做某事：used to do sth. 8.某人自己的：one’s own 9.能够做某事；有机会做某事：get to do sth. 10.对…… 有信心：be confident in… 11.参加小组讨论：attend group discussions 12.喜欢做某事：enjoy doing sth. 1.低年级的；初级的（形容词）：___________ 2.公寓（名词）：___________ 3.讨论（名词）：___________ 4.方面（名词）：___________ 6.与…… 不同：_____________ 7.过去常常做某事：_____________ 8.某人自己的：_____________ 9.能够做某事；有机会做某事：_____________ 10.对…… 有信心：_____________ 11.参加小组讨论：_____________ 12.喜欢做某事：_____________ 二、必会考点 学科网（北京）股份有限公司2 / 11 学科网（北京）股份有限公司 1.Now that I am older, my life is different from when I was in primary school.既然我长大了，我的生活和小学时代已经不一样了。 （1）now that conj.既然 【知识点拓展】 必考固定搭配：now that 引导原因状语从句，“既然；由于” 中考典型例句：Now that you have finished your homework, you can go out to play. 既然你已经完成作业，你就可以出去玩。 （2）different adj.不同的 【知识点拓展】 词形变换：difference n. 差异，不同；differently adv. 不同地 必考固定搭配：be different from 与…… 不同 中考典型例句：My hobby is different from my brother’s. 我的爱好和我哥哥的不一样。 单词 / 短语 含义 核心区别 例句 be different from 与…… 不同 强调两者之间存在差异 This book is different from that one. be the same as 与…… 相同 强调两者一致，和 be different from 互为反义短语 Your bag is the same as mine. 单词 含义 例句 different adj. 不同的，作表语、定语 There are different kinds of books. difference n. 不同、差异，名词 There are many differences between us. （3）primary adj.初级的 【知识点拓展】 词形变换：primarily adv. 主要地 必考固定搭配：primary school 小学 中考典型例句：We learned many useful skills in primary school. 我们在小学学到很多有用的技能。 【即学即练】 1._______ (now that) you know the truth, you can share it with your classmates. 2.My ideas are _______ (different) from my sister’s. 3.There are many _______ (different) between our past life and present life. 4.When he was in _______ (primary) school, he was very shy. 5._______ (now that) we have grown up, our life becomes _______ (different) from before. 6.Many _______ (primary) schools have made great progress in education. 2.My family used to live in a small flat.我们家过去住在一套小公寓里。 used to过去常常 【知识点拓展】 词形变换：否定形式 didn’t use to /usedn’t to 必考固定搭配：used to do sth. 过去常常做某事（现在不再如此） 中考典型例句：I used to get up late on weekends. 我过去周末常常起得很晚。 短语 含义 核心区别 例句 used to do sth. 过去常常做某事 描述过去的习惯 / 状态，to 后接动词原形 He used to live in the countryside. be used to doing sth. 习惯于做某事 to 是介词，后接动名词 doing He is used to living in the city. be used to do sth. 被用来做某事 被动语态，表物品用途 Wood is used to make tables. 【即学即练】 1.My family _______ (use) to live in a small flat many years ago. 2.He _______ (use) to play computer games, but now he spends much time on study. 3.She didn’t _______ (use) to attend group discussions at school. 4.There _______ (use) to be few tall buildings in our hometown. 5.They _______ (use) to keep in touch by letters when they were young. 3.She has her own room and her own TV set.她拥有属于自己的房间，还有属于她自己的电视机。 own adj.自己的 【知识点拓展】词形变换：own v. 拥有；owner n. 物主，所有者 必考固定搭配：one’s own + 名词 某人自己的…… ⚠中考高频易错：own 前面必须搭配形容词性物主代词；✅has her own room 中考典型例句：Every child hopes to have his own bedroom. 每个孩子都希望拥有属于自己的卧室。 单词 含义 核心区别 例句 own(adj.) 自己的 放在物主代词后，修饰名词；one’s own sth. This is my own pen. own(v.) 拥有 动词，作谓语，等同于 have He owns a big house in the town. 短语 含义 核心区别 例句 one’s own + 名词 某人自己的…… 强调归某人专属，物主代词不可省略 This is her own bike. of one’s own 属于某人自己的 后置修饰名词，放名词后面 This is a bike of her own. set n.（机器的）一台；装置 【知识点拓展】词形变换：复数 sets 必考固定搭配：TV set 电视机；a set of 一套…… 中考典型例句：There is an old TV set in the old house. 老房子里有一台旧电视机。 【即学即练】 1.The girl wants to have _______ (own) bedroom in the new house. 2.This is her _______ (own) TV _______ (set), and she likes it very much. 3.Many teenagers hope to have their _______ (own) mobile phones. 4.There are two old TV _______ (set) in that small flat. 5.He is the _______ (own) of this big house. 4.I am glad that I get to see her every day.我很高兴我每天都能够见到她。 get v.得以；有机会 【知识点拓展】 词形变换：过去式 got；过去分词 got 必考固定搭配：get to do sth. 有机会做某事；得以做某事 中考典型例句：We get to visit the science museum this Saturday. 这周六我们有机会参观科学博物馆。 短语 含义 核心区别 例句 get to do sth. 有机会 / 得以做某事 强调有机会、有幸去做 I get to meet my favourite star. get used to doing sth. 习惯于做某事 to 为介词，后接动名词 He gets used to getting up early. get to + 地点 到达某地 后接地点名词 When will you get to the station? 【即学即练】 1.I _______ (get) to visit my best friend every week when I was young. 2.You will _______ (get) to take part in the group discussion tomorrow. 3.So far, we have _______ (get) many chances to communicate with each other. 4.When did you _______ (get) to the small flat last night? 5.She _______ (get) much help from her teachers in the past. 5.I have become more confident in my studies and often attend group discussions.我在学习上变得更加自信，并且经常参加小组讨论。 （1）confident｜/ˈkɒnfɪdənt/｜adj.｜自信的 【知识点拓展】词形变换：confidence n. 自信心 必考固定搭配：be confident in… 对…… 有信心 中考典型例句：You should be confident in yourself when you take the exam. 考试的时候你应该对自己有信心。 （2）study｜/ˈstʌdi/｜n.｜学习；学业 【知识点拓展】词形变换：studies（复数，多指学业）；study v. 学习 必考固定搭配：in one’s studies 在学业方面 中考典型例句：He makes great progress in his studies. 他在学业上取得很大进步。 （3）attend｜/əˈtend/｜v.｜参加；出席 【知识点拓展】词形变换：过去式 attended；过去分词 attended 必考固定搭配：attend group discussions 参加小组讨论；attend school 上学 中考典型例句：All students will attend the important meeting next week. 所有学生下周都要参加这场重要会议。 单词 含义 核心区别 例句 attend 出席、参加 侧重到场；后接会议、讨论、学校 attend group discussions 参加小组讨论 join 加入 加入组织、团体，成为一员 join the music club 加入音乐俱乐部 take part in 参加 参与某项活动、比赛 take part in the sports meeting 参加运动会 （4）group｜/ɡruːp/｜n.｜小组；团体 【知识点拓展】词形变换：groups（复数） 必考固定搭配：group discussion 小组讨论；a group of 一群…… 中考典型例句：We finish the task in small groups. 我们以小组形式完成这项任务。 （5）discussion｜/dɪˈskʌʃn/｜n.｜讨论 【知识点拓展】 词形变换：discuss v. 讨论 必考固定搭配：have a discussion 进行讨论；group discussions 小组讨论 中考典型例句：We had a warm discussion about the topic. 我们围绕这个话题展开了热烈的讨论。 【即学即练】 1.He is becoming more _______ (confident) in his _______ (study). 2.Many students will _______ (attend) the _______ (group) discussions this afternoon. 3.We had a hot _______ (discuss) in our small _______ (group) yesterday. 4.She has _______ (attend) many different kinds of _______ (discuss) activities so far. 5.You should be _______ (confident) of yourself and improve your _______ (study). 6.I enjoy studying with my friends.我喜欢和朋友们一起学习。 enjoy｜/ɪnˈdʒɔɪ/｜v.｜喜爱；享受 【知识点拓展】 词形变换：过去式 enjoyed；过去分词 enjoyed；enjoyable adj. 令人愉快的；enjoyment n. 乐趣 必考固定搭配： ① enjoy doing sth. 喜欢做某事（后接动名词，禁止接 to do） ② enjoy oneself 玩得开心 中考典型例句：Many students enjoy reading in their free time. 许多学生喜欢在空闲时间阅读。 单词 / 短语 含义 核心区别 例句 enjoy doing sth. 喜欢做某事 enjoy 后面只能接动名词 doing，❌enjoy to do I enjoy walking after dinner. like to do / like doing 喜欢做某事 like 两种形式均可，to do 侧重某次；doing 侧重爱好 I like swimming. 单词 含义 例句 enjoyable adj. 令人愉快的，修饰事物 We had an enjoyable trip. enjoyment n. 乐趣，快乐 Reading brings me much enjoyment. 【即学即练】 1.I really _______ (enjoy) studying with my classmates after class. 2.The girl enjoys _______ (walk) in the park in her free time. 3.They _______ (enjoy) the group discussion last week. 4.Most students have _______ (enjoy) taking part in different kinds of activities. 5.You can _______ (enjoy) the beautiful views with your friends. 7.It's amazing how much we have achieved together.我们共同取得这么多的成就，真是令人惊叹。 （1）amazing｜/əˈmeɪzɪŋ/｜adj.｜令人惊叹的 【知识点拓展】 词形变换：amaze v. 使惊奇；amazed adj.（人）感到惊奇的；amazement n. 惊奇 必考固定搭配：It’s amazing that… …… 真是令人惊叹 中考典型例句：It’s amazing that he finished the hard work in one day. 他一天就完成这份艰难的工作，真是令人惊叹。 （2）achieve｜/əˈtʃiːv/｜v.｜取得；实现 【知识点拓展】 词形变换：过去式 achieved；过去分词 achieved；achievement n. 成就 必考固定搭配：achieve one’s dream /goals 实现梦想 / 目标 中考典型例句：If you keep working hard, you will achieve your dream. 如果你坚持努力，你将会实现你的梦想。 （3）together｜/təˈɡeðə(r)/｜adv.｜共同；一起 【知识点拓展】 必考固定搭配：work together 共同努力；achieve together 共同取得成就 中考典型例句：We can finish the task better if we work together. 如果我们共同努力，就能更好地完成任务。 单词 含义 核心区别 例句 amazing adj. 令人惊叹的 修饰事物 The changes are really amazing. amazed adj. 感到惊奇的 修饰人 We are amazed at the great changes. 单词 含义 核心区别 例句 achieve(v.) 实现；取得 宾语常为 dream、goal、success He achieved his goal at last. realize(v.) 意识到；实现 侧重意识到，也可接 dream He realized his dream of being a teacher. 【即学即练】 1.It is _______ (amaze) that we have made so much progress. 2.If you work hard, you _______ (achieve) your dreams in the future. 3.We have _______ (achieve) great success when we work _______ (together). 4.All of us are _______ (amaze) at the great changes in our hometown. 5.We will stick to our goals and make them _______ (achieve) together. 三大必背句型（3a 原文原型，写作直接套用） 1.Now that I am older, my life is different from when I was in primary school. 既然我长大了，我的生活和我小学时代已经不一样了。 👉now that 既然，侧重已知事实；区别 because。 2.My family used to live in a small flat. 我们家过去住在一套小公寓里。 👉used to do sth. 过去常常做某事（现在不再） 3.It’s amazing how much we have achieved together. 我们共同取得这么多的成就，真是令人惊叹。 👉it 作形式主语；现在完成时 have achieved，强调从过去到现在的结果。 $