If you need to revise how to form the passive voice, see an explanation here. You'll find lots of exercises here. Some more here.
Passive reporting verbs: here, here, here and here. If you'd like to try something more challenging click here.
Passive causative verbs (have something done): click here, here, here and here.
Practise health vocabulary
And use this one 👇to practise passive structures.
👈 Use the wheel to practise health vocabulary.
👈 Practise phrasal verbs