• Active: Carry it home.
• Passive: Let it be carried home.
• Active: Do it at once.
• Passive: Let it be done at once.
• Active: Open the door.
• Passive: Let the door be opened.
• Active: Throw the ball.
• Passive: Let the ball be thrown.

When the active voice is in the negative, the passive voice takes the form: Let + object + not + be + past participle.

• Active: Do not beat the dog.
• Passive: Let the dog not be beaten.

Note that do is not used in the passive form.

We can begin the passive sentence with you if we want to put emphasis on the person addressed to.

Compare:

• Active: Help me.
• Passive: Let me be helped.
• Passive: You are requested to help me.

• Active: Learn the poem.
• Passive: Let the poem be learned.