Unit 3 Environmental Protection Discover Useful Structures 课件-2023-2024学年高二英语人教版（2019）选择性必修第三册

Discovering Useful Structures Grammar—— 1. Work in groups. Look at the sentences in both columns discuss the differences between each pair. Summarize the rules for changing direct speech into indirect speech. Direct Speech Indirect Speech Observe&compare 2 Indirect Speech 1. The expert said that from the position of dead body, the bear appeared to have starved and died. 2. The reporter asked whether polar bears would die out because of climate change. 3. The reporter asked how we could save polar bears from extinction. 4. The expert advised us to work together to stop climate change. Direct Speech 1. The expert said, “from the position of its dead body, the bear appears to have starved and died." 2. The reporter asked, “will polar bears die out because of climate change?" 3. The reporter asked，“How can we save polar bears from extinction?" 4. Let’s work together to stop climate change," the expert said. Observe&compare 1. Diane asked,“What made Hurricane Katrina unusual?” 2. Diane asked,“Was it the worst natural disaster in American history?” 3. Martha said,“I want to become a scientist and help the world.” Diane asked what had made Hurricane Katrina unusual. Diane asked (me) if/whether it had been the worst natural disaster in American history. Martha said/told t me ( that) she wanted to become become a scientist and help the world. 4. Martha said,“I am doing a project on behalf of my school about global warming.” 5. Bob asked,“Why is nuclear power a sensitive topic ?” 6. Bob asked,“Could you explain how the nuclear disaster happened?” Martha said/told me (that) she was doing a project.on behalf of her school about global warming. Bob asked why nuclear power was a sensitive topic. Bob asked (me) if/whether I could explain how the nuclear disaster had happened. 7. Laura asked,“How many animals have disappeared because of human hunting ?” 8. Laura asked,“What can we do to help wild animals?” 9. Vincent said,“I have neve