标题 | has been 过去分词是什么时态 |
范文 | The system has been in operation for six months. 这个系统已经运行六个月了。 The company has been investing in new plant and equipment. 这家公司一直在投资购置新机器和设备。 A new system has been devised to control traffic in the city. 控制城市交通的'新系统已经设计出来。 Digital television has been around for some time now. 数字电视已经面市一段时间了。 A new advance has been made in the control of malaria. 在控制疟疾方面已取得新的进展。 上一篇:杭州有什么大学211 985 下一篇:值得称赞的英文短语 |
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