perfect tense have these kind of
had +pp or Past participle
it is easy to remember!!
I She He They We You = Had + Past Participle
*these is the earliest action that used/ put into past perfect!!
After I had woken up I ate my lunch.
After I had had a bath I watched t.v.
if you are confused why had had? because the past paticiple of Have is Had!! and we should remember the formula of past perfect tense ( Had + PP ) !!
I had eaten my lunch.
I had taken my nap.
so don’t be confused about the past perfect tense because the only formula you should remember is Had + PP or Past participle
ex. of past participle
Wake Woke the past participle is Woken . Past participle is easy to remember because of the words they have en at the end of it except irregular .. so be careful ..