لاحظ الفرق بين الماضى المستمر (was/ were +v+ing) والماضى التام المستمر ( had been + v+ ing ) .. .......... // When I visited Abdullah ; he was having lunch. 00 I visited him in the middle of lunch 00 .................... // When I visited Abdullah; he had been having lunch. 00 I visited him after lunch00 thank you all

Thanks
This difference is found in The Best Book