Pluperfect
n. 过去完成时\\na. 过去完成时的
📖 牛津释义
pluperfect
adj
(also past perfect) (grammar) (of the form of the verb phrase) expressing an action completed before a particular pointin the past （指动词词组形式）过去完成式的
a pluperfect(form of a) verb phrase 过去完成式动词词组. pluperfect, n (also past perfect) such a form (in English had and a past participle, as in `As he had not received my letter, he did not come') 过去完成式（在英语中had加过去分词, 如此处例句中的had加received）.
🗣️ 情景例句
I frankly don't know what to do about it.
我真不知道该怎么解决。
Jeff will lose face if his friend fails to work hard.
杰夫因他的朋友不肯勤奋工作而丢了面子。
Can't you see? They're boxes!
你没看到吗？是一些箱子。