有个英语时态不太明白toourdismay,wesawthatthereweresnailseverywhere:theyhadescapedfromthepaperbagandhadtakencompletepossessionofthehall请问为什么and前后都用过去完成时这两个动作明明是先后关

Question

有个英语时态不太明白
to our dismay, we saw that there were snails everywhere: they had escaped from the paper bag and had taken complete possession of the hall 请问为什么and前后都用过去完成时 这两个动作明明是先后关系只能一个用过去完成时呀

Answer 1

因为你看到的蜗牛"已经完成"了这两件事情, 且句子并没有要表现这两者的先后关系。
如果要体现先后，则需要用到before, until, after, since等，例如
The snails had taken complete possession of the hall since they escaped from the paper bag.