The sun (is shining )when I (got up) that morning,so I decided to (go for) a walk (in the country).

问题描述:

The sun (is shining )when I (got up) that morning,so I decided to (go for) a walk (in the country).
这个句子打括号的部分,有一个地方错了,怎么改?为什么?理由

was shining
整句过去时