问题描述：
the big clock which used to strike the hours day and night.为什么这里的used 不是 was used呢?
big clock 应该要用被动语态吧?求指教!
整个句子是：the big clock which used to strike the hours day and night was damaged many years ago.
big clock 应该要用被动语态吧?求指教!
整个句子是：the big clock which used to strike the hours day and night was damaged many years ago.
问题解答：
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