unit6 when wa it invented 全单元PPT.ppt

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。 常用的被动语态短语 be made of from into be used to do for doing as Language point 1. I think the telephone was invented before the car. 我认为电话在汽车之前发明的。 (1) I think 后接的一个分句做I think 的宾语, 这个分句称叫做宾语从句。 (2) was invented 是被动语态。 (3) invent 做动词, 意为 “发明,创造”,其名词有两种形式:一种为inventor “发明者”; 一种为 invention “发明,创造” 例如:Edison was a great inventor, and he invented more than 1,000 inventions in his life. Look at the things. In what order (顺序) do you think they were invented? A: When was the _______ invented? B: I think it was invented in ______. A: What is the car used for? B: The car is used for traveling. A: What is the _______ used for? B: I think it is used for _______________ . A: What is the _______ used for? B: It is used for __________. 2. It’s used for scooping really cold ice cream. 它是用来舀十分冰冷的冰淇淋的。 句型be used for 意为 “被用来做……”,介词for表示用途,后接名词或动名词。如: (1) sweaters are used for keeping warm. 毛衣是用来保暖的。 (2)小刀是用来切削东西的。 The knife is used for cutting. English is used _____travelers all over the world. The stick is used ____ a ruler. Clothes are used _____ keep warm. =Clothes are used _____ keeping warm. 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 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 t