It is/has been + since sb + 具体,简洁.

it is/has been= 翻译 that is just the way it has always been it has been a long time. what is up It is/has been + since sb + 具体,简洁. It is/has been+since sb+did 怎么用? Electricity has always been around a__________ it is invisible. It is a week since he has been to BeiJing. it is 3 years since Tom has been abroad It is reported that the British destroyer has been sunk. the payment has been successful,it is mobile website screenshot It has often been said that life is difficult as it isas it is 如何理解 It has been three hours since he left his office.把has been 换成is也可以吗 It has been proved that his theory is practical 怎么变为 His theory has been proved ( )如题 it has been since.用法 It has been in my It's has been accepted it has long been assumed 为啥it is some time since与it has been some time since没区别