English Grammar 现在完成进行时现在完成进行时1.1 现在完成进行时的构成have/has been + doing 肯定式 否定式 疑问式疑问否定式I have been workingI have notbeen workingHave I been working?Have I not been working?He has been sleeping He has not been sleepingHas he been ...

时间:2024-11-21 00:19栏目:中学教育