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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sū, sú, sǔ, sù

first tune

sū

crisp; crispy 酥 sū

wake up; back to life 甦 sū

Chinese characters also pronunced sū

second tune

sú

customs; customary vulgar; tasteless; tawdry 俗 sú

fourth tune

sù

vegetarian diet plain and simple 素 sù

speed; velocity fast; quick; rapid 速 sù

lodge; stay overnight 宿 sù

tell; narrate sue; appeal 訴 sù

solemn; serious 肅 sù

serious; solemn deep sincerity; formal and dignified 嚴肅 yán sù
dignified; strict 嚴 yán	solemn; serious 肅 sù

Chinese characters also pronunced sù