SOFF X · AIHujjatingizni AI yaratsinSovg'ani olingMahsulot tavsifi
Learn about the past perfect continuous tense, its formation using "had been" and the -ing form of a verb, and how it is used to describe continuous actions that occurred in the past up to a certain time
#past participle#-ing form#time#past perfect#verb
Muallif
Shaxram AbulqosimovTasdiqlangan muallif
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