Question

Change the voice: he was promoted to the rank of squadron leader

Answer 1

The given sentence is already passive. It can be changed into active voice as shown below:

The Vice-Air Chief Marshal promoted him to the rank of squadron leader.

Explanation

This is a subject implied case. A subject implied sentence in active-passive voice is a sentence that is passive but the subject is missing. While converting it into active we have to provide the subject from our side. This sentence is already passive. So we will provide the subject ‘The Vice-Air Chief Marshal ’ from our side. Hence the active voice of the given sentence will be as given below:  

Since the passive sentence is in Simple Past Tense, the active sentence will also be in Simple Past Tense.  

Active Present Perfect = S + V2 + O.

Passive Present Perfect = O + was/were + V3 + by + S

Answer 2

Hey mate!!

The given sentence is in passive we have to change it into active.

Before this we have to know that this is a 'subject implied case' where the subject is missing. While converting into active we have to provide the subject from our side.

:

The General Dyer promoted him to the rank of squadron leader.

Hope this will helpful for you...