句型转换。
1. I have a baseball bat.（改为否定句）
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2. My grandfather has many interesting stories.（对画线部分提问）
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3. He has an English book. （改为复数形式）
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4.There is a tall tree next to the house.（变为一般疑问句）
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5. His basketball is under the bed.（对画线部分提问）
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