This is the 17th most frequent Vietnamese word.
phải
"Phải" in Vietnamese means "must," "have to," or "right (correct)," depending on context.
Here, 'phải' denotes a necessity or obligation, indicating that the speaker is required to go.
Tôi phải đi bây giờ.
I have to go now.
Here, 'phải' expresses an assumption or a strong belief about the statement being made.
Hôm nay trời phải khá nắng.
Today the weather must be quite sunny.
In this question, 'phải' is used as part of a question structure to confirm a statement.