The past perfectThe aspect expressing completion. E.g.: He’s finished university. subjunctive has the same form as the past perfect tenseA grammatical category that is marked by verb inflection. To express when an event or action happens in time or when a state exists, we use tenses..

had + past participle

It is used in subordinate clauseA clause that cannot be a sentence in itself. It is joined with a main clause. E.g.: I wouldn’t go there if I were you. ("if I were you") When I arrived he was surfing. ("when I arrived")s and expresses an unrealA tense that expresses a hypothetical situation. E.g.: I wish you were here. past situation:

I wish they had arrived on time. (They didn't arrive on time.)
I would've bought the dress if there hadn't been such a queue. (There was a long queue, so I didn't buy the dress.)
She would rather I had gone to bed earlier. (I didn't go to bed early.)
He seems as if he hadn’t slept for days. (He seems not to have slept for days, but he has.)

The subjunctive
The subjunctive Past subjunctive