Grammar: ⚙️ Verbs in Depth: 🎭 Modals & 🌱 Non-Finite Verbs (Advanced) (B2) - Lesson 4: Passive Voice with Modals (The work must be finished.)

The Grammar Lab

published_with_changes

Passive Modals

កិរិយាសព្ទអកម្មជាមួយ Modals

Use the Passive Voice with modals when the receiver of the action is more important than who did it.

ប្រើប្រយោគអកម្ម (Passive Voice) ជាមួយ Modals (must, should, can...) នៅពេលដែលទង្វើ ឬអ្នកទទួលរងទង្វើ មានសារៈសំខាន់ជាងអ្នកធ្វើសកម្មភាព។

build

build The Formula

រូបមន្តទូទៅ

Subject + Modal + be + V3 (Past Participle)

Modals = must, should, can, could, might, will
V3 = finished, done, written, submitted

update

update Present & Future

សម្រាប់បច្ចុប្បន្ន និងអនាគត (Modal + be + V3)

The work must be finished. ការងារនេះត្រូវតែត្រូវបានបញ្ចប់។

It can be done easily. វាអាចត្រូវបានធ្វើដោយងាយស្រួល។

The form should be signed today. ទម្រង់បែបបទនេះគួរតែត្រូវបានចុះហត្ថលេខានៅថ្ងៃនេះ។

history

history Past Passive

សម្រាប់អតីតកាល (Modal + have been + V3)

To talk about the past, we use have been instead of "be".

It should have been done yesterday. វាគួរតែត្រូវបានធ្វើរួចតាំងពីម្សិលមិញ។ (តែមិនបានធ្វើ)

The keys might have been stolen. សោរប្រហែលជាត្រូវបានគេលួចហើយ។

gpp_maybe The "Be" Trap!

Don't forget the verb "To Be"!

(កុំភ្លេចពាក្យ "be" ឬ "have been" ឲ្យសោះ! បើគ្មានវាទេ ប្រយោគនោះមិនមែនជា Passive Voice ឡើយ។)

The work must finished. close

(Missing "be")

The work must be finished. check

Passive Modals 🎬

Watch Teacher Sopheak break down the structure for both present and past passive modals. Notice how changing "be" to "have been" pushes the sentence into the past!

quiz

Quick Check ⚡

ការត្រួតពិនិត្យចំណេះដឹង

update Present/Future

The report must ___ submitted by 5 PM.

(របាយការណ៍ត្រូវតែត្រូវបានដាក់បញ្ជូនត្រឹមម៉ោង ៥ ល្ងាច។)

history

history Past Passive

The window is broken. It might ___ smashed by a ball.

(កញ្ចក់បែក។ វាប្រហែលជាត្រូវបានគេគប់នឹងបាល់។)

gpp_maybe TRICKY QUESTION!

Which sentence is grammatically correct?

(តើប្រយោគមួយណាត្រឹមត្រូវ?)

swap_horiz

swap_horiz Active vs Passive

"Someone should clean the room."
What is the passive form?

(តើទម្រង់អកម្មរបស់ប្រយោគនេះជាអ្វី?)

assignment_turned_in

Mission 🎯

អនុវត្តជាក់ស្តែង!

The Rules assignment_turned_in (សរសេរច្បាប់ ១ នៅកន្លែងធ្វើការ ឬសាលារៀនរបស់អ្នក។ ឧ. "Phones must be turned off.")

history

Mission 🎯

អនុវត្តជាក់ស្តែង!

Past Regrets history (សរសេររឿង ១ ដែលគួរតែត្រូវបានធ្វើរួចកាលពីម្សិលមិញ តែមិនបានធ្វើ។ ឧ. "The email should have been sent.")

swap_horiz

Mission 🎯

អនុវត្តជាក់ស្តែង!

Rewrite It swap_horiz (ប្តូរប្រយោគនេះទៅជា Passive: "They can finish the project tomorrow.")

Ask a Question 🙋‍♂️

តើអ្នកមានចម្ងល់មែនទេ? សួរគ្រូនៅទីនេះ!

U

Recent Questions

S

Serey 2 hours ago

Teacher, can I use "by" in these sentences? Like "The work must be finished by John."

Reply thumb_up 15

SP

Sopheak Pich Teacher 1 hour ago

Hi Serey! Yes, you absolutely can! But remember, the main reason we use the passive voice is because the *person* doing the action isn't important. If John is important, it's usually better to just use the active voice: "John must finish the work." 📝

V

Vireak 4 hours ago

Do I need to change the modal if it is singular or plural? Like "musts"?

Reply thumb_up 10

SP

Sopheak Pich Teacher 3 hours ago

Good question! NO! Modals are super easy because they NEVER change form. No "s", no "ed", no "ing". "It must be done" and "They must be done" are both correct! 💡