Explanation

āύāĻŋāĻŽā§āύāϞāĻŋāĻ–āĻŋāϤ āĻŦāĻžāĻ•ā§āϝāϟāĻŋ active voice-āĻ āĻāĻ•āϟāĻŋ āφāĻĻ⧇āĻļāϏ⧂āϚāĻ• (imperative) āĻŦāĻžāĻ•ā§āϝ:
“Switch off the fan.”

Passive voice-āĻ āφāĻĻ⧇āĻļāϏ⧂āϚāĻ• āĻŦāĻžāĻ•ā§āϝ āϰ⧂āĻĒāĻžāĻ¨ā§āϤāϰ āĻ•āϰāϤ⧇ āĻšāϞ⧇ āϏāĻžāϧāĻžāϰāĻŖāĻ­āĻžāĻŦ⧇ āφāĻŽāϰāĻž “let + āĻŦāĻ¸ā§āϤ⧁ + be + past participle” āĻĢāĻ°ā§āĻŽ āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻ•āϰāĻŋāĨ¤ āĻāĻ–āĻžāύ⧇ āύāĻŋāĻšāĻŋāϤ āĻ­āĻžāĻŦ āĻšāĻšā§āϛ⧇ āϕ⧇āω āϝ⧇āύ āϐ āĻŦā§āϝāĻŦāĻ¸ā§āĻĨāĻž (switch off āĻ•āϰāĻž) āĻ•āĻžāĻ°ā§āϝāĻ•āϰ āĻ•āϰ⧇āĨ¤ āϤāĻžāχ:

1. subject āĻĒāϰāĻŋāĻŦāĻ°ā§āϤāύ: āĻŽā§‚āϞ āĻŦāĻžāĻ•ā§āϝ⧇ subject āĻšāϞ (you) āύāĻŋāĻ°ā§āĻŦāĻžāĻ• āϧāϰāĻž āĻšāϝāĻŧ⧇āϛ⧇āĨ¤ passive-āĻ āφāĻŽāϰāĻž āĻŽā§‚āϞ āĻŦāĻ¸ā§āϤ⧁āϕ⧇ (the fan) subject āĻšāĻŋāϏ⧇āĻŦ⧇ āϤ⧁āϞ⧇ āφāύāĻŦā§‹āĨ¤
2. āĻ•ā§āϰāĻŋ⧟āĻž āĻĒāϰāĻŋāĻŦāĻ°ā§āϤāύ: “switch off” āĻāϰ past participle āĻšāĻšā§āϛ⧇ “switched off”āĨ¤
3. āφāĻĻ⧇āĻļāϏ⧂āϚāĻ• passive āĻĢāĻ°ā§āĻŽ: “let + subject + be + past participle”āĨ¤

āϏ⧁āϤāϰāĻžāĻ‚ “Switch off the fan” āĻāϰ āφāĻĻ⧇āĻļāϏ⧂āϚāĻ• passive āĻšāĻŦ⧇:
“Let the fan be switched off.”

āĻĻ⧃āĻˇā§āϟāĻžāĻ¨ā§āϤ āĻŦā§āϝāĻžāĻ–ā§āϝāĻž:
- “Let” āĻĻā§āĻŦāĻžāϰāĻž āφāĻĻ⧇āĻļāϏ⧂āϚāĻ• āĻ­āĻžāĻŦ āĻŦāϜāĻžāϝāĻŧ āĻĨāĻžāϕ⧇āĨ¤
- “the fan” passive’āϰ āύāϤ⧁āύ subjectāĨ¤
- “be switched off” āύāĻŋāĻ°ā§āĻĻ⧇āĻļ āĻ•āϰ⧇ āϝ⧇ āĻĒāĻžāĻ–āĻž āĻŦāĻ¨ā§āϧ āĻ•āϰāĻžāϰ āĻ•āĻžāϜāϟāĻŋ āϏāĻŽā§āĻĒāĻ¨ā§āύ āĻšā§‹āĻ•āĨ¤

āĻāĻ­āĻžāĻŦ⧇ active imperative āĻĨ⧇āϕ⧇ passive imperative-āĻ āϰ⧂āĻĒāĻžāĻ¨ā§āϤāϰ āĻ•āϰāϞ⧇ āĻŦāĻžāĻ•ā§āϝ⧇āϰ āĻŽā§‚āϞ āφāĻĻ⧇āĻļāϏ⧂āϚāĻ• āχāύāĻŸā§‡āύāĻļāύ āĻ…āĻ•ā§āώ⧁āĻŖā§āĻŖ āĻĨāĻžāϕ⧇ āĻāĻŦāĻ‚ āĻŦāĻžāĻ•ā§āϝāϟāĻŋ āĻ¸ā§āĻŦāϝāĻŧāĻ‚āϏāĻŽā§āĻĒā§‚āĻ°ā§āĻŖ āĻ“ āϏāĻ āĻŋāĻ• passive āĻĢāĻ°ā§āĻŽā§‡ āϚāϞ⧇ āφāϏ⧇āĨ¤

āϏāĻžāϰāϏāĻ‚āĻ•ā§āώ⧇āĻĒ
“Switch off the fan” āĻŦāĻžāĻ•ā§āϝāϟāĻŋ passive imperatives āĻ āϰ⧂āĻĒāĻžāĻ¨ā§āϤāϰ āĻ•āϰāϤ⧇ “let the fan be switched off” āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻ•āϰāϤ⧇ āĻšāϝāĻŧ, āϝ⧇āĻ–āĻžāύ⧇ “let” āφāĻĻ⧇āĻļāϏ⧂āϚāĻ• āϧāϰ⧇ āϰ⧇āϖ⧇āϛ⧇, “the fan” āύāϤ⧁āύ subject āĻāĻŦāĻ‚ “be switched off” passive āĻ•āĻžāĻ āĻžāĻŽā§‹ āύāĻŋāĻļā§āϚāĻŋāϤ āĻ•āϰāϛ⧇āĨ¤