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

Unit 6 Period 2 Grammar 【学习目标】 Learning Objectives 1 To know the usage of present perfect continuous tense 2 To use present perfect continuous tense correctly 【学习过程】 Learning activities 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)? Answers: _______________________________________________________________________ _______________________________________________________________________ Now look for more sentences with the present perfect continuous tense in the reading passage, and summarise its uses in your own words. _______________________________________________________________________ _______________________________________________________________________ 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: _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ 目标二: To use present perfect continuous tense correctly Activity 1: Complete the passage with the correct form of the verb in brackets. I 1 ________ (hear) a strange sound for a while. It’s a deep, loud roar, like a lion’s.