While oin his thirties, Shen Kuo frequently dreamed of a place. In his
deram, he climbed a hill, the top of which was covered brightly colored flowers
and trees. Clear waters flowed at the base of the hill, with trees on either
side.
请问最后一句话Clear waters flowed at the base of the hil中，我同学问，过去时flowed可以改成过去进行时was flowing嘛？因为这是梦境中的画面，是一个静止的场景，水在那一个瞬间的动作，肯定是进行的呀？我解决不了。
我跟他说，前面的was covered...这里表示是一种过去时间段中，过去语境中的常态，不需要进行时。就好像是描述家乡的场景，是一种常态，不需要进行时。只不过是梦境中，把常态整体平移到过去时中而已。
但是我说服不了他。
