Select the option that expresses the given sentence in passive voice. They are organising a concert for charity.

Correct — A. The active verb is are organising — present continuous — and the passive must keep that aspect.

Rule: present continuous passive = is/are being + past participle.

Object to subject: "a concert" moves to the front, so the verb agrees with it in the singular — is being organised.

Subject to agent: "they" becomes "by them", and the adverbial "for charity" stays where it was.

That is option (a): A concert is being organised by them for charity.

Why the others are wrong

• (b)
  They are organising a charity concert. — Still active. This only compresses 'a concert for charity' into 'a charity concert'. The doer is still the grammatical subject, so no change of voice has happened.
• (c)
  A concert for charity is organising by them. — is organising is the active -ing form, not a passive. A passive needs being plus the past participle: 'is being organised'. As printed, the concert is doing the organising.
• (d)
  They are being organised a concert for charity. — Promotes the wrong noun. The thing organised is a concert, not 'they', so this version says the people are what is being arranged.

Changing voice is a mechanical operation with three moves, and the tense of the original survives all of them.

The object becomes the subject. The verb becomes a form of be in the same tense plus the past participle. The original subject becomes a by-phrase.

Aspect travels with it: simple present goes to 'is done', present continuous to 'is being done', present perfect to 'has been done'. Check the auxiliary before you check the word order.

Key facts

• Present continuous passive is is/are being + past participle, as in 'is being organised'.
• The passive verb agrees with its new subject: a concert is, even though the active subject 'they' was plural.
• The by-agent can be dropped when the doer is unknown or unimportant, and is normally kept when the active sentence names the doer, as here.

Common traps

• Writing is organised and quietly losing the continuous aspect the active sentence carried.
• Keeping the plural verb from the active sentence instead of agreeing with a concert.
• Accepting a rewrite that is merely shorter. A passive must move the object into subject position.

No directly related past PYQ was found.