Unit 4 Adversity and Courage Discover useful structures课件-2023-2024学年高中英语人教版（2019）选择性必修第三册

Discovering Useful Structures UNIT 4 ADVERSITY AND COURAGE Lead-in——Listen to an English song and try to fill in the blanks. I _ with a shadow overhead I _ with a cloud above my bed I have been lonely for so long Trapped in the past, I just can’t seem to move on I _ all my hopes and dreams away Just in case I ever need them again someday I _ aside time to clear a little space in the corners of my mind…… have been living have been sleeping have been hiding have been setting The Present Perfect Continuous Tense gjbj (g) - Time adverbial Contents The structure of the present perfect continuous tense Three usages of the present perfect continuous tense The comparison between the present perfect continuous tense and the the present perfect tense 3 ①Indeed, thanks to the good ideas of lots of people, many people around the world have been enjoying city centre streets without cars for many years. ②He has been fighting with a friend recently. ③I have been looking for a job for three months. ④I have been writing letters all this evening and I’ve just finished them. ⑤You haven’t been doing your homework those days. ⑥Too much has been happening today. Observe and discover—The structure Summarize: (1)现在完成进行时的构成:肯定形式 ave/has been doing (句①②③④⑥);否定形式 have/has not been doi (句⑤)。 (2)现在完成进行时表示动作开始于过去,并一直持续到现在,动作有可能继续进行下去,也可能 刚刚结束 (句④)。 (3)现在完成进行时也可以 带有某种感情色彩 (句⑥)。 have/has been doing have/has not been doing 刚刚结束 带有某种感情色彩 1. We have been waiting for you for half an hour. 2. The Chinese have been making paper for two thousand years. 3. I have been learning English since three years ago. ①现在完成进行时态表示动作还未结束,还要继续 下去。其动作是否继续下去,则由上下文而定。这个时态多用于 动词,如live, learn, lie, stay, sit, wait, stand, rest, study等。 持续 延续性 Three usages of the present perfect continuous tense(1) 动作还将继续下去 动作发生在过去,刚终止,不再继续下去。 动作发生在过去,还将继续下去。 补充 以下几类动词不能用于现在完成进行时: 表示感官、感觉:see,hear,smell 等; 表示爱憎:love,prefer,mind 等; 表示希望、意愿:wish,want,desire 等; 表示相信、猜想:believe,think,suppose 等; 非延续性动词。 6 1. All these days he has been writing