英语为什么过去式的句子中用现在进行时？

Question

2. Today was Sunday. Li Ming and Zhang Hong were going to the library. They were talking and laughing happily. An old woman with a basket was walking in front of them. Suddenly the old woman fell over and the apples in the basket dropped on the ground. They ran up to her as quickly as they could. Li Ming helped the old woman stand up. Zhang Hong helped to put the apples into the basket. Luckily there was nothing serious with her. They decided to send the old woman home together. The old woman was so thankful that she couldn’t say a word. What kind children they were! We should learn from them.

Answer 1

过去式的句子中没有现在进行时，有过去进行时、表示过去的某个时间正在进行的动作或状态

今天是星期天。 李明和张洪要去图书馆。 他们正愉快地谈话说笑。 一个带篮子老妇人在他们前面走。 老妇人突然跌倒了，篮子里的苹果都掉到了地上。 他们尽可能快地跑过去。 李明帮助老妇人站起来。 张洪帮助把苹果放入篮子。 幸运的是她不怎么严重。 他们决定一起送老妇人回家。 老妇人激动得说不出话来。他们是多好的孩子啊! 我们应该向他们学习。

Answer 2

是过去进行时唉：was,were+动词现在分词本回答被提问者采纳

Answer 3

那是过去完成时！