had played是什么时态(had worked是什么时态)

In fact, he had played online games since the age of 11.

事实上,他从11岁起就开始玩网络游戏。

They had once or twice played bridge at the club.

他们偶尔在俱乐部打桥牌。

Experimental logic had played a very important role in it.

试验逻辑学派在其间扮演了一个极其重要的角色。

The history of the Republic had played an important role.

曾经在共和国的历史上发挥着重要的作用。

Teaching model of three layers had played important role in computer base teaching.

三层次计算机基础教学模式对计算机基础教学起到重要的指导作用。

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