A sentence has been given in Active/Passive Voice. Out of the four alternatives suggested, select the one which best expresses the same sentence in Passive/Active Voice.
She painted the portrait with a lot of concentration.
The sentence is in active voice where the verb expresses the action of subject upon object. Thus to convert it into passive voice:$
Object + Helping Verb + Verb 3rd Form + By + Subject$
The object 'portrait' should be written before the subject 'her'. The tense is simple past so the rule is:$
Active voice: Subject+V2+Object
Passive Voice: Object +was/were+V3+by+Subject
Thus option 3 is the correct answer.
The sentence is in active voice where the verb expresses the action of subject upon object. Thus to convert it into passive voice:$
Object + Helping Verb + Verb 3rd Form + By + Subject$
The object 'portrait' should be written before the subject 'her'. The tense is simple past so the rule is:$
Active voice: Subject+V2+Object
Passive Voice: Object +was/were+V3+by+Subject
Thus option 3 is the correct answer.