Might As Well
When a situation has already reached a certain point, you might as well take advantage of it. Thai expresses this opportunism with the structure ไหนๆ ก็... แล้ว (since [this is already the case] / might as well...).
To use it, wrap ไหนๆ ก็ and แล้ว around the existing situation, followed by the action you are justifying. If there is a subject (like a person or thing), it typically goes between ไหนๆ and ก็.
If the subsequent action is an immediate consequence, it's common to add เลย (right away / just go ahead) to emphasize doing it without hesitation. Let's look at this in the context of visiting the ร้านทำผม (hair salon).
| Since I am already at the hair salon, I might as well get a haircut. | ไหนๆ ก็ มา ร้านทำผม แล้ว ตัด ผม เลย ครับ |
You can also use this to justify changing your look. For instance, if you decide to ย้อม (to dye) your hair to deal with grays, you might as well go all the way.
| Since my hair is already white, I might as well dye it black. | ไหนๆ ผม ก็ ขาว แล้ว ย้อม สี ดำ เลย ครับ |
Suggesting Better Options
You can also use this structure to suggest a better or more logical course of action given the circumstances. Simply end the sentence with ดีกว่า (it's better to...).
If your hair is damaged or ฟู (frizzy), you might suggest a fresh start rather than trying to save it.
| Since my hair is already dry and frizzy, it's better to just cut it short. | ไหนๆ ผม ก็ แห้ง ฟู แล้ว ตัด สั้น เลย ดีกว่า ครับ |
| Since the weather is already hot, it's better to just tie your hair up. | ไหนๆ อากาศ ก็ ร้อน แล้ว รวบ ผม เลย ดีกว่า ครับ |
Asking Questions and Giving Advice
This structure isn't just for stating what you will do; it's extremely useful for prompting others. You can ask if someone wants to add an extra service, like cutting หน้าม้า (bangs), or remind them of a necessary follow-up action, like using a treatment to บำรุง (nourish) their hair.
| Since you are already trimming your hair, might as well cut bangs too? | ไหนๆ ก็ เล็ม ผม แล้ว ตัด หน้าม้า ด้วย ไหม ครับ |
| Since you already dyed your hair, you must nourish it too. | ไหนๆ ก็ ย้อม ผม แล้ว ต้อง บำรุง ด้วย นะ คะ |
Offering Help
You can also use this pattern to offer a favor based on someone's current situation. If your sister is free, you might offer to ถัก (to braid) a เปีย (braid) for her.
| Since my younger sister is already free, I will braid her hair for her. | ไหนๆ น้องสาว ก็ ว่าง แล้ว ฉัน จะ ถัก เปีย ให้ ค่ะ |