1. Rumus passive voice untuk present perfect tense 2. Rumus passive voice untuk simple present tense

present perfect
objek, has/have been, verb2, subjek

contoh : Mary has helped john jadi Jon has been helped by Mary.

simple present 
objek, to be, verb2, subjek

contoh : Mary helps John jadi John is helped by Mary

present perfect.
 a) active : s+has/have+v3+o/c
 b) passive : o+has/have+been+v3+by subject

simple present
 a) active: s+v1+o/c
 b) passive : o+is/am/are+v3+by subject