PRESENT PERFECT CONTINUOUS TENSE - Yds, Yds Testleri, Yds Hazırlık, Yds Kursları,İngilizce Kitap,

ingilizce gramer dersleri ve konu anlatımlarını kpds.org da bulacaksınız ... In the positive sentence form of the Present Perfect Continuous Tense, helping verbs have been / has been + VING are used after the subject.

www.kpds.org