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5. There are some flowers in the vase.
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6.This is my sister.
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7.We are sweeping the floor.
二、借助动词don’t/doesn‘t,第三人称单数用doesn’t,其余人称用don‘t，放到人称后面，动词前面其他照写。特别记住：前面用doesn’t, 后面的动词一定还原成原形。Some变成any.
例如：陈述句: I like the ducks. He likes the dogs.
否定句：I don‘t like the ducks. He doesn’tlike the dogs?
把下列句子改为否定句。
4. We need some masks.
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5. They like making the puppet.
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6. Su Hai and Su Yang live in a new house.
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4.I put a book on my head.
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5. They sing “In the classroom”together.
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6.We play basketball on Sundays.
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7. Tom likes listening to music
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