Question

He father is witing a poem passive voice

Answer 1

The correct question can be

  His father is writing a poem.

{ Change it into a passive voice }

Answer :

Active voice rule :

The given sentence is in Present Continuous Tense whose Tense form is

Subject + auxiliary verbs ( am / is / are ) + verb + (- ing) + object

Here,

    subject -- his father

    auxiliary verb -- is

    verb -- write

    - ing --  (- ing)

    object -- a poem

Passive voice rule :

The passive voice formula for Present Continuous Tense is

Object + am / is / are + being + verb ( 3rd form ) + by / with + subject

Hence, the required passive voice be

  A poem is being written by his father.

Answer 2

Q: His father is writing a poem.
Answer :- A poem is being written by his father.

The sentence "His father is writing a poem." is in active voice and formed by using Present continuous tense.

Structure of present continues tense :-

Subject + auxiliary verb (is/am/are) + v4 + object.

Structure of its passive voice :-

Subject + auxiliary verb (is/am/are) + being + v3 + object.

Here,
Object of active voice became Subject and Subject of active voice became object.