When the active verb is in the past ( was lying ), the passive uses the perfect infinitive: to have been + -ing .
The "English Grammar" series by Eka and M. Zambakhidze typically spans approximately and covers essential linguistic structures required for intermediate and advanced proficiency. The updated versions (often labeled "UPD" or "Step Up") are designed to align with modern testing standards. Key Areas Covered:
When the active verb is in the past ( was lying ), the passive uses the perfect infinitive: to have been + -ing .
The "English Grammar" series by Eka and M. Zambakhidze typically spans approximately and covers essential linguistic structures required for intermediate and advanced proficiency. The updated versions (often labeled "UPD" or "Step Up") are designed to align with modern testing standards. Key Areas Covered: english grammar eka zambakhidze answers upd