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whenwe后加动词原形还是过去式句子翻译过来是当我们合计了所有账单后意识到我们花费的太多了所以句中的合计是用过去式还是原形

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when we 后加动词原形还是过去式
句子翻译过来是当我们合计了所有账单后意识到我们花费的太多了 所以句中的合计是用过去式还是原形
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都可以
eg.When we are in school,we have to behave ourselves.
When we were in primary school,we often played during break.