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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to link more related multi-character Chinese words!

huī, huí, huǐ, huì

first tune

huī

ash; dust grey color 灰 huī

grey color 灰色 huī sè
grey 灰 huī	color 色 sè

bone ash; cremains 骨灰 gǔ huī
bone 骨 gǔ	ash 灰 huī

recover; restore 恢 huī

reinstate; recover 恢復 huī fù
recover 恢 huī	recover 復 fù

splendor; brilliance 輝 huī

glory; splendor 光輝 guāng huī
light 光 guāng	splendor; brilliance 輝 huī

wave; wield direct; command 揮 huī

wave one's hand 揮手 huī shǒu
wave; wield 揮 huī	hand 手 shǒu

command; direct 指揮 zhǐ huī
finger; point at 指 zhǐ	direct; command 揮 huī

Chinese characters also pronunced huī

second tune

huí

back; return 回 huí

return home; go home 回家 huí jiā
back; return 回 huí	home 家 jiā

Chinese characters also pronunced huí

third tune

huǐ

regret; repent 悔 huǐ

regret; regretful 後悔 hòu huǐ
after 後 hòu	regret 悔 huǐ

destroy; ruin 毀 huǐ

doom; complete destruction 毀滅 huǐ miè
destroy 毀 huǐ	extinguish 滅 miè

Chinese characters also pronunced huǐ

fourth tune

huì

meeting; gathering good at; able to 會 huì

hold a meeting 開會 kāi huì
open 開 kāi	meeting 會 huì

I don't know (how to) I won't (do something bad) 我不會 kāi huì
I 我 wǒ	not 不 bú	know; able 會 huì

wisdom; intelligent 慧 huì

wisdom; intelligence 智慧 zhì huì
wise 智 zhì	wisdom; intelligent 慧 huì

favor; benefit 惠 huì

favor; kindness; benevolence 恩惠 ēn huì
debt of gratitude 恩 ēn	favor 惠 huì

Chinese characters also pronunced huì