we said that什么时态? we said it all

关于“we said that…”结构中从句的时态选择，需遵循英语语法中的时态一致规则，并注意独特情况。下面内容是具体制度及示例：

一、时态调整制度

• 基本制度：后退一个时态
  当主句动词是过去时（said）时，从句的时态需与主句保持一致，通常将原时态“后退”至对应的过去形式：

  • 原句为现在时 → 从句用过去时
    原句：She works here. → We said that she worked here.
  • 原句为现在完成时 → 从句用过去完成时
    原句：He has finished. → We said that he had finished.
  • 原句为将来时 → 从句用过去将来时
    原句：They will come. → We said that they would come.

• 例外：客观真理或普遍事实
  若从句表达的是科学事实、天然规律或永恒真理，即使主句是过去时，从句仍用一般现在时：
  原句：The earth goes around the sun. → We said that the earth goes around the sun.

二、具体应用场景

• 直接引语转间接引语

  • 直接引语：She said, “I am studying.”
    间接引语：She said that she was studying.
  • 直接引语中的时刻状语需调整：
    “I saw him yesterday.” → He said that he had seen him the day before.

• 虚拟语气中的时态
  若从句表达与事实相反的假设（虚拟语气），主句用过去时，从句需用过去完成时：
  We said that if we had known earlier, we would have helped.

三、注意事项

• 时刻状语的提示影响
  若从句中有明确表示过去的时刻状语（如 last year, in 1990），即使主句是过去时，从句仍需用过去时：
  We said that they visited Paris last year.

• 直接引语的保留情况
  若直接引语本身为过去时且需保持原意，间接引语中可能保留原时态：
  直接引语：She said, “I was tired.” → 间接引语：She said that she was tired.

四、拓展资料表格

若需进一步了解动词过去式变化制度（如 go→went、take→took），可参考一般过去时态的具体构成。