had built是什么时态

had built是过去完成时时态。

Peter had built the overhead ladders, and the next day he fitted them to the wall.

彼得已经搭好了攀爬横梯，第二天便把它们安在了墙上。

Out in front, Clarke had built up such a sizeable safety margin that he eased the pace and started cruising.

克拉克远远地开在前面，已保持了一段足够长的安全车距，他于是放慢车速，开始定速巡航。

We're going to build a house on this lot.

我们打算在这块地上建造一座房子。

The house was still being built.

房子还在建造中。

He built up the business over a period of ten years.

他用了十年时间把这个企业创建起来。