مشاهدة النسخة كاملة : has developed or has been developed


djdjdj
13-10-2010, 11:59 AM
Satellite navigation(has developed-has been developed)?

elbhy
14-10-2010, 02:58 AM
Satellite navigation has developed .................what
I think such sentence is not grammatical as satellite navigation can't be a doer of anything
the answer should be satellite navigation has been developed

djdjdj
14-10-2010, 06:42 PM
Thankssssssss