过去完成时的定义结构时间状语等
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过去完成时的定义结构时间状语等
过去完成时的定义结构时间状语等
过去完成时的定义结构时间状语等
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.
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...
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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.
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