It has been three hours since he left his office.把has been 换成is也可_其他解答

It has been three hours since he left his office.把has been 换成is也可以吗

人气：346 ℃　时间：2019-09-27 05:38:16

解答

最好最正确还是用 has been,因为 since 通常都是跟 has been,have been,had been 搭配.