Unit 3 Sea Exploration Discovering Useful Structures 不定式课件-2022-2023学年高中英语人教版（2019）选择性必修第四册

UNIT 3 SEA EXPLORATION 动词不定式 Read the following sentences and analyze what functions the colored part serves as in each sentence. 1. To complete the great map of the world was a strong passion for the people of early civilisations. 2. Marco Polo’s tales inspired European explorers to search for sea routes from west to east. 3. Merchants from China and many other places met to negotiate trade deals. 4. To reach out across the sea remains a strong desire today. 5. The aim of this initiative is to encourage cooperation and trade across the historic Silk Road areas. 主语 宾语补足语 状语 主语 表语 Lead-in 6. This will help to greatly develop the whole area for the benefit of future trade and cultural exchange. 7. There are still many other places left to explore. 8. China has joined other nations on several expeditions to explore the Arctic. 9. There is an urgent need to study the Arctic in order to understand climate change and its effects. 10. The need to trade and the desire to enhance relationships will drive China to reach out across the sea far into the future. 宾语 定语 状语 定语 定语；定语 Lead-in 动词不定式 主动 被动 用法 一般式 to do to be done 表示在谓语动词所表示的动作之后或同时发生的动作 完成式 to have done to have been done 表示在谓语动词所表示的动作之前发生的动作 进行式 to be doing / 表示正在进行的动作，与谓语动词所表示的动作同时发生 完成进行式 to have been doing / 表示在谓语动词所表示的动作之前一直进行的动作 不定式的构成与形式 ● to do 表示的动作通常与谓语动词的动作 _______ 发生或在其 _______ 发生。 ① I asked him to attend the meeting. ② The theme park, to be opened in 2025, will attract people all over the country. 同时 之后 二、动词不定式的时态和语态 01 Conclusion 1 一般式：to do / to be done ① He seems to be reading English poems. ② He seems to be thinking deeply, without noticing me overpassing him. ● to be doing 强调动作正在进行，或与谓语动词动作________。 同时发生 02 Conclusion 2 二、动词不定式的时态和语态 进行式：to be doing ① He is said to have translated the book into English last year. ② He claimed to have been badly treated in the supermarket when he was doing shopping yesterday. ● to have done 表示的动作在谓语动词 __________ 发生。 之前 03 Conclusion 3 二、动词不定式的时态和语态 完成式：t