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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.
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