Unit 15 It’s a mystery to me！（课件）-2023-2024学年新概念英语青少版 2A

Unit15 It’s a mystery to me！ 1. What letter is an animal?哪个字母是一个动物？ [答案]B（Bee） 2. What letter stands for the ocean?哪个字母代表海洋？ [答案]C（sea) 3. What letter is a question?哪个字母是一个问题？ [答案]Y（why） 4. What letter is your eye?哪个字母是你的眼睛？ [答案]I（eye） Review 一般过去时（实义动词） 1.定义 2.标志词 3.结构 4.动词过去式变化规则 一般过去时 1.定义： 表示过去某个时间里发生的动作或状态。 2.标志词 yesterday系列：yesterday morning last 系列：last month in+ 过去年份系列：in 2000 一段时间+ago系列 ：an hour ago just now(刚才) this系列等 3.结构 ①肯定： 主语+动词过去式+其他    ②否定： 主语+ didn't +动词原形+其他 规则：一找实义动词，二过去式还原， 三加didn’t  ③一般疑问句结构： Did +主语+动词原形+其他 规则：一加Did，二过去式还原，三变 肯定回答： Yes, sb did.     否定回答：No, sb didn't. 动词变过去式规则：（直去变双） （1）一般情况下，动词词尾加 ed ， （2）以不发音的 e 结尾动词，动词词尾加 d， （3）以辅音字母 + y结尾的动词，把y变为i 再ed，：  （4）以一个辅音字母结尾的重读闭音节动词，双写词尾辅音字母，再加 ed，   1.I played basketball yesterday. 2.She visited the Great Wall last month. 3.They played soccer this morning. 4.My father studied here 20 years ago. 5.Linda painted pictures last night. 6.I watched TV yesterday morning. 7.Karen jumped in the car just now. 8.They climbed the mountains last year. New words instead [ɪnˈsted] 作为替代 holiday [ˈhɒlədeɪ] 假日 instead 作为替代 game 游戏，运动 nap 小睡 a day out 外出一天 holiday 假日 grammar 一般过去时--特殊疑问句 1.I did my homework yesterday. What did you do yesterday? 2.Tom cleaned the desk last night. Who cleaned the desk last night? 3.I visited my friends last month. When did you visit your friends? 4.William had a bath this morning because he didn’t want to take a shower. Why did William have a bath this morning? 5.She played baskertball in the park. Where did she play basketball? （1）对时间提问： When +一般疑问句? （2）对主语提问：Who 直接做主语? （3）对做某事事提问：What主语后带do？ （4）对原因提问：Why +一般疑问句? （5）对地点提问：Where后无go? 1.I played basketball yesterday. 2.She visited the Great Wall last month. 3.They played soccer this morning. 4.My father studied here 20 years ago. 5.Linda painted pictures last night. 6.I watched TV at home yest