Unit 6 Nurturing Nature Grammar 课件-2023-2024学年高二英语外研版（2019）选择性必修第一册

外研选择性必修 第一册 Unit 6 Period 2 Grammar 1 2 To know the usage of present perfect continuous tense To use present perfect continuous tense correctly 学习目标 目标一: To know the usage of present perfect continuous tense Activity 1: Look at the sentences from the reading passage and answer the questions. a Wild animals such as these Tibetan antelopes have now been using these passages for years. b ...before I know it, we have reached Tanggula Station. 1 Which of these statements are true about sentence (a)? (1) Wild animals started using these passages in the past. (2) Wild animals used these passages only once. (3) Wild animals still use these passages now. 2 What is the difference between the expressions in bold in sentences (a) and (b)? They are different in form and meaning. For sentence (a) the form is “have been doing”, while for sentence (b) the form is “have done”. In meaning, the bold part in sentence (a) means the action is continuous from the past; while the bold part in sentence (b) means the action happened once in the past. Now look for more sentences with the present perfect continuous tense in the reading passage, and summarise their uses in your own words. 1 All this time, the song “Sky Railway” has been playing inside my head. 2 Wild animals such as these Tibetan antelopes have now been using these passengers for years. 3 The journey has been flying by,... 4 The Qing-Tibet Plateau has been attracting people’s admiration for centuries. Activity 2: Read the sentences below. Find out the common thing below and summarise the structure. 1. I have been reading the book. 2. I have been living here since 1988. 3. I have been waiting for two hours. 4. She is very tired. She has been working all morning. Summary: 所有画线部分都是由____________________________构成的，都属于_____________________________。 have/has+been+doing 现在完成进行时 【语法精析】 （1）表示动作从过去某时开始，一直延续到现在，将来还可能延续下去，强调动作的延续性。 I have been waiting for an hour, but she hasn’t come yet. Tom has been working hard since the new t