Practice: because, so and gaw
What you will be able to do
Give a reason and a consequence the way Thais say them, and pick the right register of because and so for a chat, a counter and a sign.
Cause comes first, then ก็เลย (gâw loei) plus the result. เพราะ is the everyday because, เพราะว่า opens a spoken explanation, เพราะฉะนั้น is spoken therefore, and เนื่องจาก/ดังนั้น…จึง are the formal and written registers. ก็ได้ agrees, ดีเลย enthuses, and เลย after a negative means at all.
รถติดมาก ก็เลยมาสาย — the everyday apology shape is…
The everyday shape states the cause bare, then ก็เลย (gâw loei) plus the result: รถติดมาก ก็เลยมาสาย (rót dtìt mâak gâw loei maa sǎai) — traffic was bad, so I'm late.
เพราะ in ผมชอบอยู่เชียงใหม่เพราะอากาศดี means…
เพราะ (phráw) attaches straight to a short reason and means because. It can follow the main clause when the result comes first — no ว่า needed.
Which is the natural answer to ทำไมไม่กิน (why aren't you eating)?
เพราะว่า (phráw wâa) is how you open a spoken explanation, and it is the natural answer to a ทำไม question: เพราะว่าเผ็ดเกินไป (phráw wâa phèt goen bpai) — because it's too spicy.
Which “because” is the announcement / BTS loudspeaker register?
เนื่องจาก (nêuang-jàak) is formal 'because' — the BTS loudspeaker voice. Recognise it; don't use it at the noodle stall.
เพราะฉะนั้น (phráw chà-nán) means…
เพราะฉะนั้น (phráw chà-nán) is the mid-register spoken therefore — so then, that being the case. Teachers say it constantly.
ดังนั้น…จึง is the register for…
ดังนั้น (dang-nán) pairs with จึง (jeung), the written cousin of ก็เลย, in the same pre-verb slot. It is sign Thai.
Someone offers you a plan you're lukewarm about. Which is the honest “that works too”?
ก็ได้ (gâw dâi) means 'that works too', not 'great'. Warm it with khráp or khâ; if you actually like the plan say ดีเลย (dii loei) instead.
In ไม่แพงเลย, what does loei mean?
After a negative, เลย (loei) means 'at all': ไม่แพงเลย (mâi phaeng loei) — not expensive at all. Sentence-final after an adjective it intensifies: อร่อยมากเลย — really delicious. Position tells you which loei you're hearing.
In ผมก็ไม่รู้ครับ (I don't know either), what does ก็ do?
Linking ก็ (gâw) hooks your sentence to the previous speaker's: they didn't know, you also don't. It is the 'also/either' connector.
แล้วก็ in เอาข้าวผัด แล้วก็น้ำเปล่า means…
แล้วก็ (láew gâw) strings items and actions: 'and then, and also'. It is the hinge of every spoken order and every recounted day.
Which is the enthusiastic “that's great”?
ดีเลย (dii loei) is the enthusiastic yes — really good. ก็ดี (gâw dii) is 'alright I guess', and ก็ได้ (gâw dâi) is 'that works too'. The three are a scale of warmth.
Which sentence has BOTH because and so — correctly?
Because AND so in one sentence is correct Thai, not a mistake: เพราะฝนตก เลยไม่ได้ไปตลาด (phráw fǒn dtòk loei mâi dâi bpai dtà-làat) — because it rained, I didn't end up going to the market. Bare เลย is the casual short form of ก็เลย.
อะไรก็ได้ means…
Question word + ก็ได้ means 'any-': อะไรก็ได้ anything, ที่ไหนก็ได้ anywhere, เมื่อไหร่ก็ได้ anytime, วันไหนก็ได้ any day.
ก็ดีนะ as an answer to เป็นยังไงบ้าง means…
ก็ดีนะ (gâw dii ná) is the lukewarm answer to how's it going — 'okay I guess', sometimes polite cover for 'not great'. ดีมาก is the enthusiastic one.
Common mistake
A flat ก็ได้ (gâw dâi) means 'that works too', not 'great' — delivered toneless it reads as 'fine, whatever' and quietly offends. Warm it with khráp or khâ, and when you actually like the plan say ดีเลย (dii loei) instead.