句型转换。

1. Jump on the train.(改为否定句)

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2. Do you like apples? Do you like oranges?(将两句合并成选择疑问句)

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3. Would you like some soup?(作否定回答)

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4. I like to skip.(改为否定句)

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5. I cat breakfast seven times a week.(对画线部分提问)

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成新折扣法比较粗略，主要用于初步估价，或者同时需要大量建筑物进行估价的场合。（）