问题描述：
the reason why.is that.结构中的is有时态变化 吗?
该句型中的is会有时态变化吗?比如这样的句子对不对呢
The reason why i was late for class this morning was that i got up late.
该句型中的is会有时态变化吗?比如这样的句子对不对呢
The reason why i was late for class this morning was that i got up late.
问题解答：
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