The following video demonstrates each syllable of the pinyin structure
and the exercise of pinyin/zhuyin with basic Chinese 4-tune pronunciation

Mandarin pinyin tunes
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zhūn, zhún, zhǔn, zhùn

first tune

zhūn

earnest and patient in instructing 諄 zhūn

Chinese characters also pronunced zhūn

third tune

zhǔn

allow; permit; grant 准 zhǔn

accurate; precise 準 zhǔn

hawk; falcon 隼 zhǔn