Unit 3 Sea Exploration Discover Useful Structures 复习动词不定式学案-2022-2023学年高中英语人教版（2019）选择性必修第四册

Lead-in:Find all the sentences containing infinitives (动词不定式) in the reading passage. Then mark their functions. (P29 E1) 1 As the subject (S) 2 As the predicative (P) 3 As the object (O) 4 As the object complement (OC) 5 As the attributive (Attr) 6 As the adverbial (Ad) 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. 6.Trading has grown greatly in recent years, and will continue to do so in years to come. 7.which will help to greatly develop the whole area for the benefit of future trade and cultural exchange. 8.There are still many other places left to explore. 9.China has joined other nations on several expeditions to explore the Arctic. 10.There is an urgent need to study the Arctic in order to understand climate change and its effects. 11.The need to trade and the desire to enhance relationships will drive China to reach out across the sea far into the future. 一、动词不定式的构成:基本形式:_____________否定形式:_____________ 时态 主动式 被动式 一般 进行 无 完成 完成进行 无 二、动词不定式的时态和语态 一般式：to do / to be done I asked him to attend the meeting. The theme park, to be opened in 2025, will attract people all over the country. Conclusion 1: to do 表示的动作通常与谓语动词的动作 _______ 发生或在其 _______ 发生。 进行式：to be doing He seems to be reading English poems. He seems to be thinking deeply, without noticing me overpassing him. Conclusion 2: to be doing 强调动作正在进行，或与谓语动词动作______________。 完成式：to have done / to have been done He is said to have translated the book into English last year. He claimed to have been badly treated in the supermarket when he was shopping yesterday. Conclusion 3: to have done 表示的动作在谓语动词