the robots have been sent to repair the damaged nuclear powe

来源：学生作业帮编辑：百度作业网作业帮分类：英语作业时间：2024/04/28 09:13:05

the robots have been sent to repair the damaged nuclear power station in Japan
It was the first time that the robots __have been sent____________ to repair the damaged nuclear power station in Japan.横线处为什么用现在完成时?
横线处改为 had been sent
不好意思打错了

had been sent是对的.it was the ,time that 用过去完成时.
再问：改为 were sent 可以吗
再答：这是固定的。如果前面是一般现在时就用现在完成时。

the robots have been sent to repair the damaged nuclear powe After the car have been damaged,the car was sent to repair.这 After the car had been damaged,the car was sent to repair.怎么请问可不可以这样改,After having been damaged, the car was sent to rep the goods have been found badly damaged. they tried hard to repair the damaged car the sick ____(have/has) been sent to the hospital, He must have been sent to the hospital 改反意疑问句 The（）the local people () have been sent to the disaster area A large number of books have been sent to the Hope School in Many books have been sent to the Hops school in that village The sick have been sent to hospital 这里加be是不是被动?