V plain / i-adj / na-adj な / noun の + とき(に)

Nghĩa: when / at the time of
Cấu trúc (Formation): V plain (non-past or past) + とき(に); i-adj + とき(に); na-adj + な + とき(に); noun + の + とき(に).
Độ trang trọng: neutral