问题补充:
This new airport has been in service for six years ago错在哪里可是通过since引导后似乎ago还是可以出现在完成时的
答案:
去掉ago.
This new airport has been in service for six years./This new airport has been in service since six years ago.
两种改法Both OK.
已更新!
时间:2020-05-24 21:09:49
This new airport has been in service for six years ago错在哪里可是通过since引导后似乎ago还是可以出现在完成时的
去掉ago.
This new airport has been in service for six years./This new airport has been in service since six years ago.
两种改法Both OK.
已更新!