Question

The postman had delivered all the letters. ( Change into future perfect tense)​

Answer 1

ANSWER: The postman will have delivered all the letters.
EXPLANATION: the rule of future perfect tense is- subject + will/shall + have + third form of verb + object

Answer 2

Answer:

The postman will be delivering all the letters .

Explanation:

as it is gonna Happen in future we will add will / shall + be .