Salvete.
This exercise gives the following worked example.
Parentes liberos vident.
Liberi a parentibus videntur.
The following passage contains various groups of words with underlining and the intention that the student should replace the wording with the relevant passive form seems clear. I have worked my way through the exercise and was feeling confident until…
Numquam magister te laudare potest.
The meaning seems clear to me but I’m at a loss as to the way in which this could be expressed using the passive voice. I had simply moved on and continued but I find myself coming back to this. I’d be very grateful for any pointers as to what the correct wording might be. I hope this query is of interest to others as it is to me.