Change the following sentence into the Active form.
The new theory is said to have been developed over decades.
Show answer & explanation
Correct answer: A
Explanation
Correct Answer: They say that the new theory has been developed over decades.
Explanation
• The given sentence is in the passive voice using a reporting structure: Subject + is said + to have been + V3.
• To convert it into the active voice, introduce a general subject like They or People with the reporting verb in the simple present tense (say).
• The perfect infinitive passive (to have been developed) corresponds to the present perfect tense (has been developed) in the subordinate clause.
• Structure: They say that + subject + has been + V3...