过去完成时的定义结构时间状语等
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共2个回答
热心网友
1）过去完成时的定义: 动词的一种时态形式，表示到过去某一时间已经完成的行为或动作。
2）结构：had + 动词的过去分词
3）时间状语：by...; for...; since... 等等。
4）例句：
He had finished his homework by 9 o'clock last night.
He had waited there for three hours by that time.
He had always stayed in his office ever since that morning.追问请写详细点 谢谢
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热心网友
主语+had+过去分词v-pp.(done)
①肯定句：主语+had+过去分词.
②否定句：主语+had+not+过去分词.
③一般疑问句：Had+主语+过去分词?
肯定回答：Yes,主语+had.
否定回答：No,主语+had not .
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）？
⑤被动语态：主语+had（hadn't)+been+过去分词
1. 由时间状语来判定
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 before last Wednesday.
