Unit 4 Using language 课件-2021-2022学年高中英语外研版（2019）选择性必修第二册

Using Language 1 But it vital not to take any chances. c. It is important to remember that Ebola doesn’t respect national boundaries Read and Think 2 a. But it vital not to take any chances. b. But not to take any chances is vital c. It is important to remember that Ebola doesn’t respect national boundaries d. To remember that Ebola doesn’t respect national boundaries is important Read and Think 3 It 作形式主语 位置 含义 翻译 指代内容 作用 句首 避免句子头重脚轻 真正的主语替换it 无含义 to do sth ving that从句 4 1. I felt it was my duty as a doctor to go there and offer my help. 2. It is so inspiring to have colleagues like Wilton, Maisy, Alfonso, not to mention all the others I have worked with. 3. In a world still facing so many problems, it is absolutely essential for us all to collaborate to create a global community with a shared future of peace and prosperity. Look for more sentences with this structure in the reading passage 5 It 指代 to do sth It be + adj + to do sth It vital not to take any chances.