Question

father had composed a long letter to the headmaster change the voice​

Answer 1

$\huge{ \underline {\overline{ \mathfrak{\mid{ \purple{ \: \: ANSWER \: \: } \mid}}}}}$

$\star \: \: \: \mathbb{ \underline{ \underline{ \pink{ \: \: ACTIVE \: \: VOICE \: \: \: }}}}$

Father had composed a long letter to the headmaster.

$\star \: \: \: \mathbb{ \underline{ \underline{ \pink{ \: \: PASSIVE \: \: VOICE \: \: }}}}$

A long letter had been composed by father to the headmaster.

…………………………………………………………………………………

$\huge{ \star \: \: \mathsf{ \underline{ \underline{ \red{ \: \: RELATED \: \: \: NOTE \: \: }}}}}$

Structure of Simple Past Tense :-

( In Active Voice)

Subject + Had + Past participle form of Verb + Complement.

Structure of Simple Present Tense :-

(In Passive Voice)

Subject + Had + Been + Past participle form of Verb + Preposition + Complement.

The given sentence is an Assertie Sentence of Past Perfect Tense.

The main verb of the sentence is COMPOSE.

The Past participle form of COMPOSE verb is COMPOSED .

Answer 2

Answer:

A long letter had been composed by father to the headmaster.