英语：Unit 4 Inventions and Inventors学案（北师大版九年级）.docVIP

Unit 4 Inventions and Inventors 【本讲教育信息】 一. 教学内容： Book 15 Unit 4 (I) 学会用动词的被动语态描述物体的使用方法，构成成份和功能作用。 ? 二. 教学重点： ? 1. 动词一般现在时被动语态。 ? 2. 动词一般过去时被动语态。 ? 3. 动词一般将来时被动语态。 ? 4. 情态动词的被动语态 ? 5. 重点词汇 ? 三. 具体内容： （一）被动语态是动词的一种特殊形式，表示句子中的主语是动词的承受者，也就是动作的对象。一般说来，只有需要动作对象的及物动词才有被动语态。 被动语态的用法： 1）当我们不知道谁是动作的执行者时，或者没有必要指出谁是动作的执行者时， e.g. Printing was introduced into Europe from China. A new bridge will be built here next year. 2）当我们关心动作的承受者但也关心动作的执行者时，用by加动作的执行者。 e.g. The town was destroyed by an earthquake. 英语动词的被动语态由助动词be+及物动词的过去分词构成。 时态举例： 1. 一般现在时： Football is played all over the world. English is spoken in Britain, the US and some other countries. Roger, you are wanted on the phone. 2. 一般过去时： The Great Hall of the People was built in 1959. His leg was broken in an accident. The International was written in 1871 by Eugene Potter, the French worker-poet. 3. 一般将来时: More schools will be built in my hometown. He will be taken to hospital tomorrow. 4. 情态动词的被动语态 The meat should be kept in a fridge. Rice can be boiled or steamed. This material must be handled carefully. Text: The first paper was ???(make) in China in 105 AD by a man called Cai Lun. The oldest pieces of paper still existed were made in about 150 AD. For over 500 years the art of making paper was ??????(limit) to China. In 610, papermaking was ?????????(introduce) into Japan, and then into Central Asia in about the year 750. Paper made its first appearance in Egypt in about 800 but it was not ???????(produce) there until the year 900. Kites ????????(know) in China about 3,000 years ago. They were used in battles to transport supplies to soldiers who were in danger. Wheelbarrows ?????????(invent) in the Han dynasty. They were used by builders to carry heavy supplies. In a battle, wheelbarrows were used to carry injured or dead soldiers. Gunpowder ????????(discover) by the Chinese who used it for making fireworks hundreds of years ago. It was probably introduced into Europe from the Middle East. Umbrellas ???????(invent) b