用法:在过去的时间里,两个动作中,发生在前的那个动作要用过去完成时。
结构:had+过去分词
They had sold the car before I asked the price.
The train had left before I arrived at the station.
五年级英语语法讲解,在线求解答
用法:在过去的时间里,两个动作中,发生在前的那个动作要用过去完成时。
结构:had+过去分词
They had sold the car before I asked the price.
The train had left before I arrived at the station.