这里的was为什么要用过去式

Question

这里的was为什么要用过去式I was waiting for a bus和A cart and horse was seen in the distancit

Answer 1

I was waiting for a bus 和 A cart and horse was seen in the distancit 都是指说话前发生的事情，暗含 “刚才” 的意思。第一句意思是 “刚才我正等你来着”，第二句意思是 “刚才看到远处有一辆车来着”。
另如，你在说话前不知道的情况下闯入开会的的房间，这时候会说 “对不起，不知道你们正开会”，用英语应该是 Sorry, I didn't know you were having s meeting. 所以用过去时是因为现在你已经知道了。