The tire was changed by Tom in active choice would be <em>"</em><em>Tom</em><em> </em><em>changed</em><em> </em><em>the</em><em> </em><em>tire</em><em>.</em><em>"</em><em> </em>
I think that you first write it and take it apart based by syllables, then you separate the “tricky” part (eg. most likely “gh” in “eighth”) and then you write it again. I’m just guessing though. I hope he is able to understand it.