MORE PASSIVE PRACTICE

You have  to change 10 sentences from active to passive. Then you  click "check answers" and get immediate feedback on your answers.

https://www.ego4u.com/en/cram-up/grammar/passive/exercises?simple-present 

Here's a song with examples about changing passive to active with 'sings' and 'sung'.

https://www.youtube.com/watch?v=ARaEpSAD-ng