过去完成时的结构

Question

如题所述

Answer 1

过去完成时的直观解析

过去完成时是一种动词时态，用于描述在过去某个时间点之前已经完成的动作或状态。其基本结构如下：

主语 + had + 过去分词（done） + 其他成分

例如：

After I had read it, I was filled with horror.
在读完它之后，我内心充满了恐怖。
By the age of 10, he had learned to play the piano for five years.
他在10岁时已经熟练掌握了五年的钢琴技艺。

识别过去完成时的关键在于它与特定时间状语的搭配。以下是一些常见的时间状语：

By the end of + 过去时间：如By the end of last year, we had solved more than 100 problems.（到去年年底，我们已解决超过100个问题。）
By the time + 从句（动作发生在过去）：如By the time she left the city, she had used up all her savings.（离开城市时，她的存款已经用完。）
By (the time of) + 过去时间：如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。）
Before + 过去时间：如He had never ridden a horse before last month.（直到上个月，他从未骑过马。）