过去进行时：一种表示过去某个时间点或一段时间内正在进行的动作或状态的时态。
a tense of verbs used in describing action that is on-going
同义词： progressive / progressive tense / imperfect / continuous tense
... imperfect tense 未完成时, 未完成过去式... progressive 先进的 imperfect 不完美的 ...
诗人为要表达神赐王的美福绝不是短暂的，特别在第3节运用「未完成时态（imperfect tense），即以前如是，现在亦如是，目的是要显明神对王的赐予是没有止尽的，王向他求寿，神必使他「日子长久，直到永远。
... imperfect tense 未完成时, 未完成过去式... progressive 先进的 imperfect 不完美的 ...
If you are talking about something that is completely in the past, you use the Past Tense (sometimes called the Imperfect), e.g.
如果所谈论的事情完全发生在过去，则用过去时态(有时也叫做未完成时态)，例如：I used to live in Seattle /我过去住在西雅图。
A Spanish verb has six present-tense forms, and six each in the preterite, imperfect, future, conditional, subjunctive and two different past subjunctives, for a total of 48 forms.
西班牙语的动词现在时有六种形态，过去时、未完成时、将来时、条件句、虚拟句以及另外两种过去时虚拟式也各自有六种形态，加起来一共是48种。
One thing you need to remember about the imperfect past tense—it is for activities that were ongoing or repeated; something you were doing in the past, or something you used to do.
你应该记住过去未完成式是指过去进行的或重复的动作，你在过去正在做的事或习惯的事。