新目标九年级Unit9 Section A.ppt

A: When was the _______ invented? B: I think it was invented in ______. 用“invented” 或 “used for”填空. 1. What are electric slippers _______? 2. Who were shoes with adjustable heels ________ by? 3. When was tea ________? 4. What are microwave ovens _______? 5. When were potato chips ________? A: Look! This looks so interesting! B: Ah, it’s a great invention of China. A: Really? When ______ it _________? B: I think it ______ _________ in Han Dynasty. (汉朝) A: What ______ it ______ for? B: Guess! A: ______ it ______ for holding water? B: No. It _____ ______ for testing earthquakes. A: Wow, it’s really amazing! abacus in the six century Chinese calculating 变被动语态时需要注意的事项 一变 二套 三注意 各种时态的被动语态的构成： 1.一般现在时态 am, is, are +过去分词 2.一般过去时态 was, were +过去分词 3.一般将来时态 will/am.is.are going to + be +过去分词 4.过去将来时态 would/was.were going to + be + 过去分词 5.现在完成时态 have, has + been +过去分词 6.过去完成时态 had + been +过去分词 7.现在进行时态 am, is, are + being +过去分词 8.过去进行时态 was, were + being +过去分词 9.含情态动词的 情态动词 + be +过去分词 所有时态的被动语态否定就是在 最前面的助动词后加 not 疑问就是把最前面的助动词提前。 变被动语态的特殊情况 一、双宾语 二、无to不定式 一感 二听 三让 四看 三、注意动词短语的 常考到的动词短语有 四、无被动语态的动词。 不及物动词及系动词 常用的被动语态短语 be made of from into be used to do for doing as Many trees are not being planted now Are many trees being planted now? 把下列的句子变为被动语态的句子： 1、They speak English in Canada . 2、People used wood for making tables. 3、They are making computers in the USA. English is spoken in Canada(by them). Wood was used for making tables. Computers are being made in the USA. 把被动句变否定 Computers aren’t being made in the USA. 4、They have grown rice in South China. 5. We must plant more trees next year. 6.I am going to clean our classroom tomorrow. More trees must be planted next year