Question

what is the past perfect tense for build

Answer 1

Past perfect tense form of the verb will be :   
            had + past participle of the verb

example:

      I write this.    -- present tense
        I wrote this.  -- past tense 
    I had written this.  -- past perfect tense of verb "to write" :  had + written

example:   Brainly had created this website.  
           past perfect tense form of "to create" :    had + created

Answer 2

The past participle form for build is Had Build.