จะ…แล้ว for About To | Thai Grammar

In จะ + event + แล้ว, preverbal จะ presents the event prospectively while final แล้ว says that a new, currently relevant stage has been reached. With a suitable event, the combination commonly means “is about to” or “will happen any moment now”: รถจะออกแล้ว “the bus is about to leave.” Neither word conjugates the verb, and the construction is not simply a discontinuous future-tense ending.

The important nuance is discourse change. Plain รถจะออก can be a neutral prediction or schedule. Adding final แล้ว presents departure as the new situation the listener must respond to—perhaps by boarding now.

A prospective event has become current

The productive frame is subject/topic + จะ + event phrase + แล้ว. The event phrase stays intact between the two viewpoint words.

Productive frame	Event slot	Natural result	Current relevance
subject + จะ + [event] + แล้ว	ออก	รถจะออกแล้ว	board now
	ถึงคิวเรา	จะถึงคิวเราแล้ว	get ready
	มืด	ฟ้าจะมืดแล้ว	daylight is ending
	ปิดรับลูกค้า	ร้านจะปิดรับลูกค้าแล้ว	order now
	หมดเวลา	จะหมดเวลาแล้ว	finish immediately

รถรับส่งจะออกแล้วครับ เชิญขึ้นรถได้เลย

rot rap song cha ok laeo khrap choen khuen rot dai loei

The shuttle is about to leave; please board now. (polite service announcement, male speaker)

จะถึงคิวเราแล้วค่ะ เตรียมเอกสารไว้ให้พร้อมนะคะ

cha thueng khio rao laeo kha triam ekkasan wai hai phrom na kha

It's almost our turn; please have the documents ready. (ordinary polite speech, female speaker)

ฟ้าจะมืดแล้วครับ เรากลับทางเดิมดีกว่า

fa cha muet laeo khrap rao klap thang doem di kwa

It's about to get dark; we'd better go back the same way. (ordinary polite speech, male speaker)

The subject may be omitted when the visible or discussed event is recoverable, as in จะหมดเวลาแล้ว. This is ordinary Thai discourse organization, not an impersonal conjugation.

💡

Final แล้ว makes the prospect matter at the reference point. It often carries the practical force “the situation has now reached the stage where this is next.”

A four-way contrast

Closely related forms divide the timeline differently. The translations overlap, but their viewpoints do not.

Thai	Viewpoint	Typical English
รถจะออก	prospective event	the bus will/is going to leave
รถกำลังจะออก	pre-event phase in progress	the bus is about to leave
รถจะออกแล้ว	departure has become the current next change	the bus is about to leave now
รถออกแล้ว	departure attained	the bus has left

รถจะออกตอนหกโมงเย็นครับ

rot cha ok ton hok mong yen khrap

The bus will leave at six in the evening. (ordinary polite schedule, male speaker; broad prospect)

รถกำลังจะออกครับ คนขับขึ้นรถแล้ว

rot kamlang cha ok khrap khon khap khuen rot laeo

The bus is about to leave; the driver has boarded. (ordinary polite report, male speaker; preparatory phase)

รถออกแล้วค่ะ ต้องรอเที่ยวต่อไป

rot ok laeo kha tong ro thiao to pai

The bus has left; we have to wait for the next one. (ordinary polite report, female speaker; departure attained)

กำลังจะ and จะ…แล้ว therefore overlap, and speakers can even combine them: กำลังจะออกแล้ว strongly highlights an imminent threshold. The forms are not interchangeable in every context. กำลังจะ explicitly looks through the preparatory phase; จะ…แล้ว packages the event as the newly current next development. See the dedicated กำลังจะ page for event-shape restrictions.

Event type and contextual endpoints

Transitions such as leaving, arriving, starting, ending, becoming dark, and running out fit naturally because they offer a boundary. Open-ended activities need a contextually understood start or change of phase.

หนังจะเริ่มแล้วค่ะ ปิดเสียงโทรศัพท์ด้วยนะคะ

nang cha roem laeo kha pit siang thorasap duai na kha

The film is about to start; please silence your phone. (ordinary polite request, female speaker)

กาแฟจะหมดแล้วครับ เดี๋ยวผมชงเพิ่ม

kafae cha mot laeo khrap diao phom chong phoem

The coffee is nearly gone; I'll make some more. (ordinary polite speech, male speaker)

ลูกค้าจะเริ่มเข้ามาแล้วค่ะ เราเปิดประตูหน้าได้เลย

luk kha cha roem khao ma laeo kha rao poet pratu na dai loei

Customers are about to start coming in; we can open the front door now. (ordinary polite workplace speech, female speaker)

In the last target, เริ่ม supplies the onset for the repeated activity เข้ามา. Without such framing, a bare activity under จะ…แล้ว may depend heavily on context. This is not a defect with a mechanical fix: speakers choose predicates that make the relevant threshold intelligible.

The reference point can be in a past scene

The construction often concerns now, but that is the default conversational anchor, not tense morphology. A past-time clause can move the relevant threshold into a narrative.

ตอนผมไปถึง ประตูกระจกจะปิดแล้วครับ

ton phom pai thueng pratu krachok cha pit laeo khrap

When I arrived, the glass door was just about to close. (ordinary polite past narrative, male speaker)

เมื่อเช้าฉันจะออกจากบ้านแล้ว แต่ฝนตกหนักค่ะ

muea chao chan cha ok chak ban laeo tae fon tok nak kha

This morning I was about to leave home, but it rained heavily. (ordinary polite past narrative, female speaker)

The English translation uses was about to. Thai keeps จะ...แล้ว unchanged; ตอนผมไปถึง and เมื่อเช้า locate the reference point. This is the same principle explained on แล้ว and reference time.

อยู่ contrasts with the impending change

Postpredicate อยู่ holds a situation at the reference point; จะ…แล้ว looks toward the next change. They often appear in contrasting clauses rather than as a compulsory stack.

ร้านยังเปิดอยู่ค่ะ แต่ครัวจะปิดแล้ว

ran yang poet yu kha tae khrua cha pit laeo

The restaurant is still open, but the kitchen is about to close. (ordinary polite service information, female speaker)

Here ยังเปิดอยู่ maintains the open state while จะปิดแล้ว announces the approaching transition. The two markers do not express an English sequence of auxiliary tenses.

💡

Use อยู่ to hold a relevant situation in view and จะ…แล้ว to point to its impending replacement. Their contrast is aspectual and discourse-based, not present versus future inflection.

Negation changes the interpretation

The sequence จะไม่ + event + แล้ว is not normally a simple “about not to” counterpart. It commonly signals a changed decision or cessation: จะไม่ไปแล้ว “won't go after all / will no longer go.” Final แล้ว marks the new plan relative to the old expectation.

ฉันจะไม่สั่งเมนูนี้แล้วค่ะ แพ้อาหารทะเล

chan cha mai sang menu ni laeo kha phae ahan thale

I won't order this dish after all; I'm allergic to seafood. (ordinary polite speech, female speaker; changed decision)

ถ้าออกตอนนี้ เราจะไม่สายครับ

tha ok ton ni rao cha mai sai khrap

If we leave now, we won't be late. (ordinary polite speech, male speaker; no final แล้ว, ordinary projected negation)

Do not derive either sentence by moving English not around auxiliaries. Thai ไม่ scopes over the following predicate, while ยัง and final แล้ว add their own discourse relations.

Ordinary-polite dialogue

ครัวจะปิดแล้วหรือคะ

khrua cha pit laeo rue kha

Is the kitchen about to close? (ordinary polite question, female customer)

ครับ อีกสิบนาทีครัวจะปิดรับรายการอาหาร

khrap ik sip nathi khrua cha pit rap raikan ahan

Yes. The kitchen will stop taking orders in ten minutes. (ordinary polite reply, male server)

งั้นขอสั่งตอนนี้เลยค่ะ

ngan kho sang ton ni loei kha

Then I'd like to order now. (ordinary polite response, female customer)

Common Mistakes

1. Using the frame after the event is already attained

❌ รถจะออกแล้วค่ะ เลยไม่เห็นรถที่ป้าย

Wrong for the intended meaning ‘the bus has left’—จะ keeps departure prospective.

✅ รถออกไปแล้วค่ะ ต้องรอเที่ยวต่อไป

rot ok pai laeo kha tong ro thiao to pai

The bus has left; we have to wait for the next one. (ordinary polite explanation, female speaker)

2. Splitting the event from its object

❌ พนักงานจะปิดแล้วร้านครับ

Incorrect neutral order—ร้าน belongs inside the closing event before final แล้ว.

✅ ครัวจะปิดรับรายการอาหารแล้วครับ สั่งตอนนี้ได้เลย

khrua cha pit rap raikan ahan laeo khrap sang ton ni dai loei

The kitchen is about to stop taking orders; you can order now. (ordinary polite warning, male speaker)

3. Assuming กำลัง is required inside every about-to frame

❌ จะกำลังถึงคิวเราแล้วค่ะ

Incorrect order—จะ…แล้ว already forms a natural threshold frame; กำลัง does not follow จะ this way.

✅ จะถึงคิวเราแล้วค่ะ ไปยืนรอหน้าห้องกันเถอะ

cha thueng khio rao laeo kha pai yuen ro na hong kan thoe

It's almost our turn; let's wait outside the room. (ordinary polite speech, female speaker)

4. Reading จะไม่...แล้ว as simple imminence

❌ ผมจะไม่ไปแล้วครับ

Misleading for the intended ‘I am about to not go’; naturally this says the speaker will not go after all or will no longer go.

✅ ผมเปลี่ยนใจแล้วครับ จะไม่ไปงานคืนนี้

phom plian chai laeo khrap cha mai pai ngan khuen ni

I've changed my mind; I won't go to tonight's event. (ordinary polite speech, male speaker)

Key Takeaways

จะ + event + แล้ว presents a prospective event as the current next change.
It overlaps with กำลังจะ, but foregrounds changed relevance more than the preparatory phase itself.
event + แล้ว means the event is attained; removing จะ therefore changes the timeline.
Past narrative anchors are possible because the frame marks viewpoint, not a future conjugation.
จะไม่...แล้ว commonly expresses a changed decision or “no longer,” not merely an imminent negative event.

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