"ฉันได้ยินพอแล้ว"

แปลว่า: I have already heard enough.

[Felipitoir]

"have heard" should not be split. This is incorrect

[hippietrail]

Incorrect. You're thinking of splitting infinitives and even that is a made-up rule.

[hippietrail]

This should also accept "I've heard enough already".