You can listen to hễ là on this page in both Northern and Southern Vietnamese accents.
How is hễ là used in a sentence?
For example: Hễ là trời mưa, đường lại ngập. (It frequently rains, and the roads get flooded.); Hễ là bị nhắc nhở, anh ấy lại cáu. (He frequently gets angry when reminded.).
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