《What are the shirts made of?》PPT课件8
Grammar Focus
1. 你的衬衫是棉的吗？____ your shirts _____ ____ cotton?
2. 是的, 而且它们产于美国。Yes, they are. And they were _____ ___ the US.
3. 飞机模型是由什么制成？ ______ the model plane ______ of?
4. 它是由旧木头和玻璃制成。It’s made of ____ _____ and ______.
5. 茶产自中国哪里？______ ___ tea _________ in China?
6. 茶产自很多不同的地区。It’s produced in many ________ _____.
7. 茶是如何制成的？_____ is tea __________?
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一、被动语态
当主语为动作的执行者时, 谓语的形式为主动语态; 当主语为动作的承受者时, 谓语要用被动语态。
e.g. Many people speak English.
（主动语态, 句子的主语many people是动作speak的执行者）
English is spoken by many people.
（被动语态, 句子的主语English是动作speak的承受者）
二、被动语态的构成
被动语态由“助动词be+及物动词的过去分词”构成。与主动语态一样，被动语态也有时态、人称和数的变化, 其变化规则与be作为连系动词时完全一样。
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Complete the sentences with the correct forms of the verbs in brackets.
1. Children under 18 _____________ (not allow) to watch this show without their parents.
2. We ________ (pay) by the boss on the last Friday of each month.
3. A: What language ___________(speak) in Germany?
B: Most people speak German, but many can speak English, too.
4. Most of the earth’s surface___________ (cover) by water.
5. The classroom _________ (clean) by the students every day.
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请将下列句子变成被动语态。
1. We use computers to search information.
2. The teacher often repeats the story.
3. They don’t allow fishing here.
4. Bill looks after his cat carefully.
5. We don’t often speak English at home.
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