Select the option that expresses the given sentence in passive voice.
Scientists were conducting experiments on the newly discovered species.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. Experiments were being conducted on the newly discovered species by scientists.
To change the voice of the sentence from active to passive, the subject and the object of the sentence are interchanged. The tense of the sentence remains the same.
Here, in the active voice, the subject is "scientists" which becomes the object in passive voice.
In active voice, the object is "experiments" which becomes the subject in the passive voice.
The tense of the sentence is "past continuous tense" (was/were + -ing form of the verb) which remains the same in passive voice.
Hence, the correct passive form is- Experiments were being conducted on the newly discovered species by scientists.