Not: ไม่ with verbs and adjectives

Put ไม่mâi right before the verb: ชอบchâwp → ไม่ชอบmâi châwp (don't like), มีmii → ไม่มีmâi mii (don't have, there isn't any), รู้rúu → ไม่รู้mâi rúu (don't know). It never changes, whoever is talking and whenever it happens. With two verbs, it goes before the first: ไม่อยากไปmâi yàak bpai.

Thai has no word for is before an adjective: กาแฟอร่อยgaa-fae à-ràwy is the coffee is delicious. Because adjectives behave like verbs, ไม่mâi goes right before them too: ชาไม่ร้อนchaa mâi ráwn. Don't add เป็นbpen: that's only for being a nationality, a job or a role.

Degree words come after the adjective: หวานมากwǎan mâak (very sweet), หวานนิดหน่อยwǎan nít-nàwy (a little sweet), and ไปbpai for too: หวานไปwǎan bpai. The exception is ไม่ค่อยmâi kâwy (not very), which goes before, like ไม่mâi. It works with verbs too, and it's the gentle way to say you don't like something: ไม่ค่อยชอบmâi kâwy châwp. Last, เลยloei at the very end adds emphasis: ชอบมากเลยchâwp mâak loei, I really love it. After a negative it means at all: ไม่หวานเลยmâi wǎan loei.

ชอบchâwp (like) takes a noun or a verb: ชอบกาแฟchâwp gaa-fae, ชอบกินchâwp gin. อยากyàak (want to) takes a verb: อยากดื่มyàak dùuem. To answer a yes/no question, Thais don't say yes: they repeat the verb or adjective, with ไม่mâi for no. ใช่châi only confirms a fact (that's right).