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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sūn, sún, sǔn, sùn

first tune

sūn

grandchild 孫 sūn

Chinese characters also pronunced sūn

third tune

sǔn

bamboo shoots 筍 sǔn

lose harm; damage 損 sǔn

lose; loss 損失 sǔn shī
lose 損 sǔn	lose 失 shī

Chinese characters also pronunced sǔn