Unit 8 语法专项课件—— 时间状语从句 + used to 2025-2026学年沪教版英语七年级下册

教学课件 沪教(牛津)英语七年级下册 Unit8语法专项—— 时间状语从句 + used to 全解精讲+分层练习 1 学习目标 1.掌握时间状语从句7个引导词的含义与用法。 2.牢记时间状语从句主将从现时态规则。 3.熟练使用 used to 描述过去习惯与状态。 4.正确书写 used to 否定句与一般疑问句。 5.能完成填空、选择、句型转换等综合题型。 时间状语从句—定义 时间状语从句用来说明动作发生的时间。 由引导词连接主句和从句两个句子。 从句不能单独成句,必须依附主句存在。 位置:可放在主句前(加逗号),也可放主句后。 核心考点:引导词区别 + 时态搭配。 时间引导词总表(表格1) 引导词 含义 用法要点 when 当……时候 接时间点/短动作 while 当……时候 接长动作/同时进行 as 随着;一边……一边 强调伴随 before 在……之前 动作先后 after 在……之后 动作先后 as soon as 一……就…… 动作紧接着 until 直到……为止 动作持续 引导词 when 用法 when:表示“当……时候”。 可接短动作或时间点。 可表示同时发生,也可先后发生。 从句可在前(加逗号),也可在后。 例句:When I was 10, I began to learn English. 例句:I was happy when I heard the news. 引导词 while 用法 while:表示“当……时候”。 只接长动作/延续性动作。 强调两个长动作同时进行。 常与过去进行时连用。 例句:While I was reading, my mom was cooking. 例句:Please be quiet while I am talking. 引导词 as 用法 as:表示“随着”或“一边……一边”。 强调动作伴随发生、同步变化。 多用于过去时。 例句:As I grew older, I understood my parents better. 例句:She sang softly as she walked home. 引导词 before 用法 before:表示“在……之前”。 强调动作有先后顺序。 主句动作先发生,从句动作后发生。 例句:Wash your hands before you have dinner. 例句:I had learned 500 words before I went to school. 引导词 after 用法 after:表示“在……之后”。 强调动作有先后顺序。 从句动作先发生,主句动作后发生。 例句:After I finished my homework, I went to bed. 例句:We will go out to play after the rain stops. 引导词 as soon as 用法 as soon as:表示“一……就……”。 强调动作衔接紧密、立刻发生。 是考试高频考点。 例句:I will call you as soon as I arrive home. 例句:As soon as he saw me, he smiled. 引导词 until 用法 until:表示“直到……为止”。 强调动作持续到某一时间点。 例句:I will wait here until you come back. 例句:She kept working until she felt tired. 时间状语从句—时态规则(核心) 规则1:主句一般将来时,从句一般现在时(主将从现)。 例句:I will go out when the rain stops. 规则2:主句一般过去时,从句一般过去时。 例句:After she finished school, she became a teacher. 记忆:看主句时态,定从句时态。 易混点:when vs while when:可接短动作/长动作,使用范围更广。 while:只能接长动作/进行时。 同时发生且都是长动作 优先用 while。 短动作/时间点 只能用 when。 例句:When I got home, it was raining. 例句:While I was sleeping, the phone rang. 时间状语从句—基础练习1 用 when / while / as 填空 1._ I was 7, I went to primary school. 2._ she was reading, I was drawing. 3._ time went by, I forgot the sad thing. 4.He called me _ he got to the station. 5.Don’t walk _ you are crossing the street. When While As when when 时间状语从句—基础练习2 用 before / after / as soon as / until 填空 1.Close the window _ you go out. 2.I will tell you the truth _ I see you. 3.He lived with his parents _ he was 18. 4._ she heard the story, she cried. 5.Think carefully _ you answer the question. before as soon as until After before 语法2:used to 定义 used to 表示过去常常做某事。 强调过去习惯/状态,现在已经不做/改变。 突出“今昔对比”,是本单元核心句型。 只能用于过去,不能用于现在或将来。 结构:主语 + used to + 动词原形。 used to 肯定句 肯定句结构:主语 + used to + 动词原形。 used 没有人称和数的变化,一律用 used。 可描述过去动作,也可描述过去状态。 例句:I used to get up early every morning. 例句:He used to be a quiet boy. used to 否定句 否定句结构:主语 + didn’t use to + 动词原形。 注意:didn’t 后面用 use,不能用 used。 表示“过去不常做/过去不……”。 例句:I didn’t use to like vegetables. 例句:She didn’t use to get up late. used to 一般疑问句 一般疑问句结构:Did + 主语 + use to + 动词原形? 回答:Yes, 主语 + did. / No, 主语 + didn’t. 注意:Did 后一律用 use,不用 used。 例句:Did you use to play basketball? 回答:Yes, I did. / No, I didn’t. used to 核心结构表(表格2) 句型 结构 注意 肯定 主语 + used to + 动原 一律用 used 否定 主语 + didn’t use to + 动原 didn’t 后用 use 疑问 Did + 主语 + use to + 动原? Did 后用 use used to 常见易错点 1.used 无人称变化:he used to(√);he uses to( )。 2.否定/疑问必须变回 use:didn’t used to( )。 3.只能表过去,不能说 I am used to(本单元不考)。 4.必须体现过去与现在对比。 例句:He used to be short, but now he is tall. used to—基础填空1 1.I _ (like) toys, but now I like books. 2.He _ (be) fat, but now he is thin. 3.They _ (live) in the city, but now they live in the countryside. 4.My father _ (smoke), but now he stops. 5.We _ (walk) to school, but now we take the bus. used to like used to be used to live used to smoke used to walk used to—基础填空2 用 didn’t use to 填空 1.She _ (like) sports, but now she loves running. 2.I _ (eat) meat, but now I eat it every day. 3.He _ (watch) TV, but now he watches a lot. 4.They _ (get up) early, but now they do. 5.It _ (be) clean here, but now it’s clean. didn’t use to like didn’t use to eat didn’t use to watch didn’t use to get up didn’t use to be 综合练习1:引导词单选 1.I will go to the park _ it is sunny. A. when B. while C. before D. until 2._ I was walking, I met my teacher. A. When B. While C. As soon as D. After 3.I will wait _ you finish your work. A. until B. before C. while D. as A B A 综合练习2:引导词单选 4.He will call me _ he arrives. A. as soon as B. until C. while D. before 5._ the game ended, we went home. A. Before B. After C. While D. Until 6.I clean my room _ I go to bed. A. when B. before C. as soon as D. until A B B 综合练习3:used to 单选 1.I _ like swimming, but now I like it. A. used to B. didn’t use to C. use to 2.Did you _ play football? A. used to B. use to C. used 3.He _ be short, but now he’s tall. A. used to B. didn’t use to C. use to B B A 综合练习4:used to 单选 4.They _ live in Beijing, but now they don’t. A. use to B. used to C. didn’t use to 5.She didn’t _ like dogs. A. used to B. use to C. used 6._ he use to be quiet? A. Did B. Was C. Do B B A 混合填空(时间+used to) 1.I started to learn English _ I was 8. 2.I will tell you _ I get the news. 3.He _ be lazy, but now he works hard. 4.She didn’t _ like drawing, but now she loves it. 5.Keep trying _ you make it. when as soon as used to use to until 句型转换(综合提升) 1.I will go shopping. I finish my homework.(合并) I will go shopping _ _ _ I finish my homework. 2.He used to get up early.(否定句) He _ _ _ get up early. 3.She used to be a nurse.(一般疑问句) _ she _ _ be a nurse? as soon as didn’t use to Did use to 汉译英 1.我过去不喜欢跑步,但现在我每天跑。 2.我一到家就给你打电话。 3.当我年轻的时候,我常常打篮球。 4.我会一直等直到你回来。 I didn’t use to like running, but now I run every day. I will call you as soon as I get home. When I was young, I used to play basketball. I will wait until you come back. 课堂总结(一) 时间状语从句:用来说明动作发生的时间。 7个引导词:when, while, as, before, after, as soon as, until。 时态核心:主将从现、主过从过。 when 接短/长动作;while 只接长动作。 as soon as 表“一……就……”,高频考点。 课堂总结(二) used to:表过去习惯/状态,今昔对比。 肯定:used to + 动原;否定/疑问:use to。 易错点:didn’t / Did 后面必须用 use。 答题技巧:先看时间关系,再选引导词; 看是否今昔对比,再用 used to。 教学课件 Unit8语法专项—— 时间状语从句 + used to Thank you for listening! 34 $