Question

过去完成时的结构

Answer 1

基本结构

过去完成时的句子结构一般为：

主语＋had+过去分词（done）＋其他成分

如：

After I had read it I was filled with horror.（我读完它之後，心里充满了恐怖。）

By the age of 10 he had learned to play the piano for five years.（他在10岁的时候，已经学了五年的钢琴。）

标志性词语

过去完成时常见的标志性时间状语主要有：

1、by the end of+过去时间

By the end of last year, we had solved more than 100 problems.（到去年年底，我们已经解决了100多个问题。）

2、by the time+从句（动作发生在过去）

By the time she left the city, she had used up all her savings.（到她离开这个城市的时候，她的存款已全部用完。）

3、by (the time of)+过去时间

He had taught maths for four years by last July.（到上个七月为止，他已经教了四年数学了。）

4、before+过去时间

He had never ridden a horse before last month.（到上个月以前他从来没有骑过马。）