The 3rd conditional is the only one that refers to the past. We use it to talk about past situations that can no longer be changed; hypothetical situations.  Practise using it here.

There are four main steps to consider when you want to use passive forms. Let’s revise the basics for changing active to passive & vice-versa.

‘Have something done’ (the causative ‘have’) is another passive form. We use it when we arrange (and usually pay) for someone else to do something for us.