九年级英语全册_Unit9When was it invented全单元课件.ppt

Look at the things. In what order (顺序) do you think they were invented? A: What is the car used for? B: The car is used for traveling. 课堂测评 (一)用适当形式填空 1 He told us that the Jet plane______ _______ (invent) in1930 2 When ______ the Great Wall _______ (build)? 3 Batteries are used for______ (see) in the dark 4 Who______ they ________ (invent) by? (二)按要求改写下列句子 1 The helicopter was invented in1990 （对划线部分提问） _______ _________ the helicopter ___________? 2. Someone turned down the television just now （改为被动语态） The television ________ _______ down just now 3 English is spoken as a second language in many countries（被动语态） People ____ _____ as a second language in many countries 4 The glass is used for keeping water hot（改主动语态） They _____ the glass_______ keeping water hot 5 I think the most helpful invention is the light bulb（对划线部分提问） ______ _______you think ______the most helpful invention? 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 3a 1.Just now we talked some inventions. Ask you: 2.Are these inventions helpful or annoying? 3.Are these inventions below helpful or annoying? 3a write three helpful and annoying inventions in the chart below. A: What do you think is the most helpful invention? B: I think the most helpful invention is the light bulb. A: Why is that? B: Well, it gives people more time to work