第1个回答 2021-01-15
句子不完整
when 引导的状语从句,当一个动作发生(一般过去时)另一个动作正在进行(过去进行时)
即
The Green family were having supper when we arrived.
当我们到达时,格林一家正在吃晚饭。
另外
when状语从句遵循主将重现。
如
I will tell him about it when he comes back.
当他回来时,我会告诉他关于这件事。
when引导的状语从句前后时态要一致。
He could swim when he was three years old.
他三岁时他会游泳。