It is time that 为什么用过去式啊?It is the first time .为什么用完成时?我总记不住 想知道原

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• It is time that 为什么用过去式啊?It is the first time .为什么用完成时?我总记不住 想知道原
• It is time that 为什么用过去式啊?It is the first time .为什么用完成时?我总记不住 想知道原
• 若曲线y=x^2在点(a,a^2)(a>0)的切线与两个坐标轴围城的三角形面积为2,则a等于
• it is high time that 可以接should 加动词原形吗?it is high time 和 it is about time 后面到底能不能接should 加动词原型啊?我的高中老师说可以接两种形式 即过去式 还有should加动词原形但是我的大学老师说只能接过去式 并且我最近做的题目中两个选项都有 结果选过去式哪位大虾能给个准确的答复啊?