I eat an apple 的被动句是
an apple is eaten by me
I ate an apple just now 的被动句是
an apple was eaten by me just now
I am eating an apple 的被动句是
an apple is being eaten by me
I was eating an apple then .的被动句是
an apple was being eaten by me then
I will eat an apple later 的被动句
an apple will be eaten by me
I would eat an apple的被动句是
an apple would be eaten by me
I have eaten an apple 的被动句是
an apple has been eaten by me
I had eaten an apple 的被动句是
an apple had been eaten by me