为何wèihéwhyHSK 6PronunciationwèihéExample sentence他为何突然改变主意,至今仍是个谜。Tā wèihé tūrán gǎibiàn zhǔyì, zhìjīn réng shì ge mí.Why he suddenly changed his mind remains a mystery.Read and choose an answerOne fixed sampleExplore a sample