have bought是什么时态

have bought 现在完成时，bought是buy的过去分词;而去掉have后就变成一般过去式了,时态不同意义也不同了；

have bought 表示已经完成的动作或状态对现在造成的影响。这里表示已经买了,也许还是新的,也许你正在使用等。

My parents have bought a house of generous dimensions.

我的父母买了一所宽敞的房屋。

We have bought in large stocks of this material.

我们购进了一大批这种材料。

Besides the two novels, I have bought two atlases.

我买了两本小说，另外还买了两本地图册。

We have bought in an extra supply of coal for the cold winter.

我们多购进了些煤以渡寒冬。