Unit 3 Fit for life Grammar and usage 课件-2021-2022学年高二英语牛津译林版（2020）选择性必修第二册

Unit 3 Fit for life Grammar and usage Present perfect continuous tense 1. Read the passage in Part A on Page 34, and pick out the sentences in present perfect continuous tense. Exploring the rules Scientists have been making great progress in robotic technology in recent years, … Over the past three months I have been testing out the limits of what I can do with my new hand, … …, I have been cooking for my family again since I got my new hand. 2. Tell the time or action background of the present perfect continuous tense in the sentences, and finish “Working out the rules” on Page 34. We use the present perfect continuous tense to talk about an action that started in the past and is still continuing now, or an action that has just finished but is still connected with (1) ____________ in some way. The verb form of the present perfect continuous tense is “(2) _________________”. Exploring the rules has/have been doing the present 现在完成进行时 1. 构成 have(has) + been+ 动词的现在分词 Ⅰ. 根据括号内提示补全下