问题描述：
she told us that she would have a holiday when she had finished the design.
为什么用"had finished",而不用"finished"?如果将前半部分变为"she tell us that she will have a holida",后边"finish"应该用什么格式?
为什么用"had finished",而不用"finished"?如果将前半部分变为"she tell us that she will have a holida",后边"finish"应该用什么格式?
问题解答：
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