If it's, of course, possible.
English is not my native language, and it's a little hard for me to remember the groups of tenses Continuous, Perfect and Perfect Continuous.
All of the continuous tenses use the present participle of the lexical verb. " I am running. ) I was running.
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All of the continuous tenses use the present participle of the lexical verb.
All of the perfect tenses use the helping verve "have."
I am running. (present continuous..)
I was running. (past)
I will be running. (future)
I have been running. (present perfect continuous)
I had been running. (past perfect continuous.)
Here is a good site for information: