我怎么会知道他开不开心啊？
“How would I know if he sounded happy?”
THE DIALOGUE REEL
他听起来开心吗？
“Did he sound happy?”
我 怎么会知道 他 开不开心啊 ？
“How would I know if he sounded happy?”
不…不是啊 你是要做导演的人
“Come on, you're going to be a director.”
“Why are you asking me? There is no way I could know that.”
Using '怎么会' (how could...) framed as a rhetorical question is a standard conversational tactic in Mandarin to immediately dismiss undue accountability.
LEARNING CHUNKS & PARTICLES
How could I possibly know?
A very common rhetorical rebuttal used to reject an unreasonable inquiry or show mild exasperation.
Enhances the rhetorical and exasperated tone of the question.
VOCABULARY & EXPRESSIONS
Parallel Spoken Cinema Scenes (语义近邻切片)
“so how do you know it's unhappy?”
“How would he know?”
“Why didn't you tell me? I didn't know it at all.”
“how you know whether it's willing or not?”
“How do you know they're the one who helped you?”
“But if we don't tell him, he won't find out.”