Question

Passive voice-was he growing plants?
were the plants has been grown by him?
were the plants being grown by him?​

Answer 1

Answer:

were the plants *being* grown by him?

Explanation:

passive voice contains the verb in past continuous. In active it will be same

Answer 2

Answer:

Passive voice=

He was growing plants.

The plants has been grown by him.

The plants are being grown by him.