Select the option that expresses the following sentence in active voice. The letter will be delivered by the postman tomorrow.

Correct — B. The given verb is will be delivered, which is 'will be' plus a past participle: simple future passive.

Converting to the active keeps the tense. Simple future active is will plus the base verb, so 'will deliver'.

The agent after 'by' becomes the subject and the old subject becomes the object: 'The postman will deliver the letter tomorrow' — option (b).

Voice moves who stands where in the sentence. It never moves the tense.

Why the others are wrong

• (a)
  The postman delivered the letter tomorrow — 'delivered' is simple past, so it changes the tense and then collides with 'tomorrow'.
• (c)
  The postman will have delivered the letter tomorrow. — 'will have delivered' is future perfect, whose passive would read 'will have been delivered'. That is not the sentence given.
• (d)
  The postman will be delivering the letter tomorrow. — 'will be delivering' is future continuous, whose passive would be 'will be being delivered'. Again, not the sentence given.

Voice conversion is a mechanical swap governed by one rule that outranks the rest: the tense stays put.

Work it in three moves. Take the agent after 'by' and make it the subject. Take the passive subject and make it the object. Rebuild the verb in the same tense, in its active form.

Here that gives postman, will deliver, the letter. Each distractor passes the first two moves and fails the third, which is why they all read fluently and are still wrong.

Key facts

• Simple future passive is 'will be' plus the past participle.
• Simple future active is 'will' plus the base form of the verb.
• Changing voice never changes the tense, the number or the time adverb.

Common traps

• Upgrading to future perfect because 'will have delivered' sounds more finished.
• Keeping 'by the postman' in the active sentence alongside the new subject.

No directly related past PYQ was found.