بالله عليكم حد يجاوبني على السؤال ده
 

workbook
page 10
by the time my father was 18,he has/had been at work for two years

By the time my father was 18,he had been at work for two years

by the time my father was 18,he had been at work for two years

By the time my father was 18,he had been at work for two years
لان by the time يأتى بعدها ماضى بسيط +فاعل+had +ماضى تام
وبالتوفيق ان شاء الله

by the time my father was 18,he had been at work for two years
مع اطيب الامانى بدوام النجاح

thank you very much