一般过去时仅仅表示过去发生的动作或状态.如：She played basketball yesterday.She was a teacher ten years ago.
过去完成时侧重表示一个动作在过去某个动作之前已经发生完成了,侧重于”过去的过去“是一个相对时态.如：When i got to the station,the bus had already left.
一般过去时和过去完成时的区别
一般过去时仅仅表示过去发生的动作或状态.如：She played basketball yesterday.She was a teacher ten years ago.
过去完成时侧重表示一个动作在过去某个动作之前已经发生完成了,侧重于”过去的过去“是一个相对时态.如：When i got to the station,the bus had already left.