过去完成时的标志词，标志短语是什么？ 谢谢

Question

如题所述

Answer 1

过去完成时常用的时间状语有：
1. by the end of last year. By the end of last term, we had learned 5000 new words.
2. By the time sb. +动词过去式 如：The bus had already left by the time I got there.
主语+had+过去分词vpp.(done)
①肯定句：主语+had+过去分词+其他.
②否定句：主语+had+not+过去分词+其他.
③一般疑问句：Had+主语+过去分词+其他?
肯定回答：Yes,主语+had

否定回答：No,主语+hadn't
④特殊疑问句：特殊疑问词或词组+一般疑问句（Had+主语+过去分词+其他）？
⑤被动语态：主语+had（hadn't)+been+过去分词+其他
一般说来，各种时态都有特定的时间状语。与过去完成时连用的时间状语有
：
（ 1 ） by + 过去的时间点。如：
I had finished reading the novel by nine o'clock last night.
（ 2 ） by the end of + 过去的时间点。如：

We had learned over two thousand English words by the end of last term.
（ 3 ） before + 过去的时间点。如：
They had planted six hundred trees b
efore last Wednesday.
由 had 加动词的过去分词构成。本回答被提问者采纳