Unit4 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

Adversity and Courage Unit 4　 Discover useful structure Grammar—The Present Perfect Continuous Tense To learn the present perfect continuous tense To practice the present perfect continuous tense by completing some exercises 01 Lead-in 1.现在完成进行时构成：“have/has + been + doing” 否定： have/has + not + been + doing 用现在完成进行时填空 1. I (work) all morning. 2. She (wait) there for hours. 3. It (rain). 现在完成进行时 have been working has been waiting has been raining 1.现在完成进行时构成：“have/has + been + doing” 否定： have/has + not + been + doing 用现在完成进行时的否定形式填空 1. I (work) all morning. 2. She (wait) there for hours. 3. It (rain). 现在完成进行时 have not been working has not been waiting has not been raining 02 Usage of Present Perfect continuous Tense 1. We have been waiting for you for half an hour. 2. We have been working for hours. The usage of the tense (1) Present Past Future ①现在完成进行时态表示过去发生的动作一直持续到现在，这个动作可能仍在继续进行或刚刚结束。这个时态多用于延续性动词，如live, learn, lie, stay, sit, wait, stand, rest, study等，并常和all the time, this week/month, all night/morning, recently, these few days, in the past + 时间, several times等时间状语以及 连用(与since和for连用时，动作常会继续下去)。 since + 时间点 for + 时间段 I have been teaching for over ten years now . 我已经教书超过十年了 2）表重复：表示到目前为止的一段时间内重复进行的活动 注意： 现在完成进行时表示的动作不是在一直不停地进行，而是从过去持续到现在断断续续重复进行的动作。 1. Tom has always been working hard. 2. You have been coughing a lot lately! 3. What have you been doing to my dictionary? ③带有 ，使语言表达更加生动。 赞许 关切 不满 The usage of the tense (3) 感情色彩 【学以致用1】　补全句子 ①Inventors ___________________ (一直在试图)to make flying cars since the 1930s. ②Tom _______________________(一直在努力学习) since the new term began. ③I _____