2021版外研版选修三英语UNIT 4 突破语法大冲关 ppt课件.ppt

1、UNIT 4 ADVERSITY AND COURAGE 突破语法大冲关突破语法大冲关 现在完成进行时 【观察例句】 1People have been enjoying the benefits of cycling in Amsterdam for years. 2Many people around the world have been enjoying city centre streets without cars for many years. 3He has been fighting with a friend. 4I have been looking for a job

2、for three months. 5I have been writing letters all this evening and Ive just finished them. 6You havent been doing your homework those days. 【归纳用法】 一、意义 现在完成进行时表示动作从过去某一时间开始，一直持续到现 在，可能还要继续进行下去。 二、构成 肯定形式：have/hasbeen doing(第三人称单数用 has，其他人称 用 have) I have been waiting for you.我一直在等你。 否定形式：have/hasno

3、tbeen doing He hasnt been using the car for the last two months. 过去两个月他一直没用车。 三、用法 1表示动作从过去某时开始一直持续到说话时还在进行，或可 能还要继续下去。通常和“for时间段”或“since时间点(或从 句)”的时间状语连用。 It has been snowing for three hours. 雪已经下了三个小时了。(从过去某一时间开始下雪，强调到现 在还在下) 2表示不久前刚刚结束的动作。这种意义通常根据上下文来判 断。 Her eyes are red. Its obvious that she ha

4、s been crying for a long time. 她的眼睛红红的，显然哭了很长时间。 3强调动作延续时间的长久或带感情色彩。 She has always been working hard. 她工作一直很努力。 4表示这段时间反复发生的事情。 I have been visiting some cities of China this month. 这个月我一直在参观中国的一些城市。 名师点津 不能用于进行时的动词如表示心理活动、属性拥有、表象感官、 行为结果的动词不用于现在完成进行时。 我已经感冒两周了。 I have been having a cold for two we

5、eks. ( ) I have had a cold for two weeks. ( ) 即学即练 单句语法填空 They (build) the bridge for two months. He (play) basketball since he was ten. has been playing have been building .单句语法填空 1The Chinese government (do) research into vaccine (疫苗) against African Swine Fever for months，recently many have recei

6、ved the first doses. 2The dollar (climb) steadily all week. has been climbing has been doing 3I (wait) for an hour and a half. 4She is very tired. She (work) all morning. 5Jim (phone) Jenny every night for the past week. 6They (build) the bridge for two months. 7The telephone (ring) in the office al

7、l the morning. has been ringing have been waiting has been working has been phoning have been building 8In the past few years，he (deal) with a few international companies. 9She is tired. She (type) letters all the afternoon. 10He (write) a letter this morning and sent it to his friend. has written h

8、as been dealing has been typing .短文语法填空 My wish is 1. (go) to a key university. I 2. (study) for many years. But I am poor 3. English since I went to junior school. My English teacher told me to insist 4. listening and writing. I 5. (learn) English every morning to improve it. Because I 6. (waste) a

9、 lot of time，it was hard to catch up with other students. After 7. (go) to high school，I 8. (stay) up late into the night and 9. (get) up early have been getting to go have been studying in on have been learning have wasted going have been staying in the morning. I 10. (write) two compositions every day. I think I should spare no effort to improve my English and achieve my dream. have been writing