九年级英语：Unit 4 Inventions and Inventors复习课件(北师大版) 课件VIP专享VIP免费

• 一、本周教学重点：• 1. 复习被动语态• 2. 情态动词表达怀疑、确定和可能。• 3. 重点词汇• 二、具体内容：• （一）被动语态：• 1. 一般现在时被动语态基本结构：• 主语＋ am/is/are ＋过去分词• The food is placed in the oven.• They are turned into heat.• 2. 一般过去时被动语态基本结构：• 主语＋ was/were ＋过去分词• Magic Squares were invented in China.• Papermaking was introduced into Japan in 610.• 3. 情态动词被动语态基本结构：• 主语＋ can/should/must ＋ be ＋过去分词• School uniform must be worn at all times.• 4. 一般将来时被动语态基本结构：• 主语＋ will ＋ be ＋过去分词• It can’t be a radio because it’s too big to be a radio.• The report will ______ （ finish ） in two days’ time.• Milk should _______ （ keep ） in the fridge.• White clothes and colored clothes should not _______ （ wash ） together.• School uniforms needn’t ______ （ wear ） at all times. • （二）情态动词：• 当不是很确定时，用 might 或 may. （ might 比may 更不确定）• Who knows what will happen. You may even have married by then.• It might be a tool for cutting things. I don’t know.• 当确定某件事是唯一的可能时，用 must.• It must be some sort of toy.• 当确信不可能发生时，用 cannot.• It cannot be a radio because it’s too big to be a radio. • Ex. Complete the sentences with might be / may be, cannot be, or must be.• 1. This exam _________ too difficult for the students. I don’t think they can finish it.• 2. It _________ a book for children. There are many cartoons in it.• 3. It _________ true. I think you made a mistake. • 4. Mr. Smith ________________ in London, Paris, or Tokyo. No one knows for sure. • 5. That _________ John. He is in New York now.• 6. Did you hear the doorbell? It _______ Nicholas...