the windows and doors came from old buildings around the tow

在英语中,如果是经历过或发生过的事一般用过去时来描述,如一次经历等等.但是对人或场所的描写仍用一般时,如：
I went to the park with my Mom yesterday.The weather was very nice.The cherry blossoms are so beautiful there.
去公园和天气是过去的事,但对樱花的描写还是用一般时.明白了吗?
再问： 为什么如 我来自中国 i am come from china 而the windows and doors came from old buildings around the town that were being pulled down 是came 我觉得应该是它现在这个样子来描述它所以应该用come
再答： 严格来说，come，应该也可以，可能是为了跟下面的were being pulled down相呼应吧。原文是不是外国人写的，其实他们对语法的规范远不如我们较真。
再问： 嗯 突然释怀 感谢 good！