[is, am, are] + Past Participle

Simple present.  They all form a logical pattern.  You are wrong about present perfect, by the way. 

am, is, are + -ing  Present continuous
was, were + -ing  Past continuous

am, is, are + anything else  Simple present
was, were + anything else  Simple past

has, have + been + -ing  Present perfect continuous
had + been + -ing           Past perfect continuous

has, have + -en  Present perfect
had + -en           Past perfect

-ing is a symbolic way of indicating "present participle" (or "gerund" if you like that term better)
-en indicates "past participle"  (even if the ending is something else like -ed)

CJ