had后面的动词用什么形式

结构

主语+had+动词过去分词

①肯定句:主语+had+动词过去分词+其他。

②否定句:主语+had+not+动词过去分词+其他。

③疑问句:Had+主语+动词过去分词+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+had+主语+过去分词+其他?

⑤被动语态:主语+had(not) +been+动词过去分词+其他。

例句

过去完成时常用的时间状语有:

1. by the end of last+时间段. By the end of last term, we had learned 5000 new words.

到上学期末，我们已经学了5000个新词。

2. By the time sb. +动词过去式如:The bus had already left by the time I got there.

3.By (the time of)+时间段

By the time of last year ,we had built two bridges.