just askingUsed to soften a question or clarify that you are only asking out of curiosity, without making a request or accusation. แค่ means “just,” while ดู adds the sense of trying or seeing what the response is.
TH: ผมแค่ถามดูนะ ไม่ได้สงสัยอะไร
EN: I'm just asking; I'm not suspicious of anything.