i think you meant 'present perfect tense' in its ing form

來源: 2009-05-08 18:02:33 [博客] [舊帖] [給我悄悄話] 本文已被閱讀:

i don't have any grammar book. but it appears to be ok. passive tense may also be fine. for instance 'being forced to quit a job is disheartening' may be grammatically correct;