1.You must cross the street .(否定句)

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2.A cat can swim.(改为否定句)

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3.I can see a hat on his head.(对划线部分提问)

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4.Can you see a ball (改为陈述句)

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5.I am a girl.(改为一般疑问句)

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6.Open the window. (否定句)

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7.My name is Mary.(对划线部分提问)

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8.There are two birds in the tree . (对划线部分提问)

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9.They are my desks.(对划线部分提问)

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10.There are some cows in the farm.(一般疑问句)

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11.Ann is from England. (改为用Where引导的问句)

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12.That is a plane. (复数句)

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13.He is a good boy. (一般疑问句)

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14.Don't talk to the bird. (肯定句)

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