Unit 9 Human Biology Section 4 Focus on Language 课件（共69张）+学案（含答案）+练习（含答案）

6 / 6 Section 4　 Focus on Language：The Perfect 课时目标 1.能够在语境中掌握各种完成时态的构成及用法。 2.能够运用完成时态表述自己对事物的观点，以达到学以致用的效果。 初识语法———在美文运用中体悟　 　 　 　　　　 　　　　 　　　　 It is the worst day that I ①have ever experienced.I ②had been dreaming for the whole night.My alarm clock didn't go off that morning.When I got up, it was 7：30! I was about to be late! After I ③had brushed my teeth and washed my face quickly, I took up my schoolbag and rushed out of the door.Before I arrived at the bus stop, the bus ④had already left, so I had to rush to school by myself! By the time I went into the classroom, my teacher ⑤had stood in the front of the classroom.She looked at me angrily and asked for my homework.I was so sad because I ⑥had left it at home! Then, the teacher punished me., ①处使用了现在完成时； ②处使用了过去完成进行时； ③④⑤⑥处使用了过去完成时。 慧学语法———在归纳演绎中学通　 一、现在完成时　 1．构成：have/has＋done。 2．用法： (1)表示过去发生的某一动作对现在造成的某种影响或结果，常被just、 already、 yet、 so far、 never、 recently/lately等副词修饰。 Have you heard from your brother recently 你最近收到你兄弟的来信了吗？ (2)表示发生在过去，从过去某一时刻开始一直持续到现在的动作或状态，常带有for和since以及in the past/last few years、 over the past years等表示一段时间的状语。 And I have been a broadcaster in the school's broadcasting station for years. 我在学校广播站担任广播员已经很多年了。 (3)表示说话前发生过一次或多次的动作，现在成为一种经验，一般译为“……过”，常带有twice、 ever、 never、 once、 before、 three times等时间状语。 I have been to Beijing twice. 我已经去过北京两次了。 (4)下列句型中常用现在完成时： ①It has been＋一段时间＋since从句； ②This/That/It is the first/second ...time that＋现在完成时； ③This/That/It is the best/finest/most interesting ...＋that＋现在完成时。 　This is the first time that Jack has won the first prize in the competition. 这是杰克第一次在比赛中获得第一名。 This is the most interesting film that I have ever seen. 这是我看过的最有趣的一部电影。 (5)在时间或条件状语从句中，现在完成时可以代替将来完成时。 I shall post the letter as soon as I have written it. 我一写完信就会寄出的。 [对点练]　(单句语法填空/完成句子) ①(2024·浙江1月高考)Over the last two years, some supermarkets _____ (start) selling chicken or salad in packs designed with two halves containing separate portions (份)． ②(2024·浙江1月高考)As a result, since 1996 a group of insurance companies _____ (spend) about $2 million per year on the Alberta Hail Suppression Project. ③(2022·全国甲卷)In the last five years, Cao _____ (walk) through 34 countries in six continents, and in 2016, he reached the top of Kilimanjaro, Africa's highest mountain. ④(2022·浙江1月高考)On a website called No Fly Climate Sci, for example, roughly 200 academics — many of them climate scientists — _____ (promise) to fly as little as possible since the effort started two years ago. ⑤I'm awfully sorry t ... ...