เมื่อ

[mʉ̌ɔ kîِن chǎn duu tee wíi jón dʉ̀k]

I watched TV until late last night (situation: describing evening)

Common structure: [เมื่อไหร่] + [Past tense verb] = When it happened

[mʉ̂a wǎn chǎn bpai thîi nân]

Yesterday I went to that place (situation: recalling a past event)

Used to describe a past event.

[mʉ̂a chǎn toh hǎa təə]

When you call me (situation: expressing a desire)

Commonly used to request a call.