cleaned the blackboard 2
closed the window ——————∣—————∣—————→∣——→ had cleaned the closed the window now blackboard She had cleaned the blackboard before she closed the window
After she had cleaned the blackboard , she closed the window
ran out of breath 2
drank water ——————∣—————∣—————→∣——→ had run out drank water now of breath He had run out of breath before he drank water
After he had run out of breath, he drank water
ate an apple 2
slept ——————∣—————∣—————→∣——→ had eaten slept now an apple She had eaten an apple before she slept
After she had eaten an apple , she slept
一、 过去完成时定义： ①表示发生在过去的动作对现在造成的某种影响或结果，用来指定在另一个过去行动之前就已经完成了的一个事件
②过去某动作一直持续到现在将来可能还要延续下去
句中的动作发生在过去之前（过去的过去），即过去完成时动作发生在过去的过去
He said he had been to Beijing twice
他 说 他 已 经 去 过 北 京 两 次
（ 因 为“说”said 就是
