10.We had had the toys for ten years before we gave them to the child. （对划线部分提问）

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9..Jack didn’t go to the cinema because he had seen the film. （对划线部分提问）

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8.When he had read the note, he ate it. （对划线部分提问）

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7..He had broken his arm when I saw him.（对划线部分提问）

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6.By the time he got to the airport, the plane had taken off. （改一般疑问）

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5.Lucy had already completed the project when I arrived.（改一般疑问）

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4.By 10:00 a.m, I had been very hungry. （改一般疑问）

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3.They began to climbed the mountain after they had bought all the food and drink.（否定）

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2.She had sung a song to us before she danced.（改否定句）

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1．I had sold the ticket when she came.（改否定句）

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