UC知道The planes had been planting seed for nearly a month when it began to rain.
来源：百度知道 编辑：UC知道 时间：2024/06/07 16:35:30
had been planting 为甚么用过去完成进行时，如果用过去完成时可以吗
不可以，因为过去完成进行时能描述plant seed这个动作从过去一直持续到began to rain这个时间，而且在下雨的过程中也是继续的；如果用过去完成时的话，就表示下雨之前，动作就停止了。
：）
不行，因为有for nearly a month，plant是延续性动词，表示飞机从开始下雨（过去）时就一直播种，播了近一个月。
Jack had some model planes and Ted liked the subject,
The planes had been planting seed for nearly a month when it began to rain.
The wind had dropped
if you had the chance.
That's what he said,planes will take the place of trains.
the seed had already taken root.it had begun to______
you can fly to the uk this moring_ you don't mind changing planes in hong kong
We had joy, we had fun, we had seasons in the sun.
The bill he had long been opposed_____......
The city had once known as prosperity