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
Click the framed calligraphic Chinese symbol icons
to link more related multi-character Chinese words!

guāi, guái, guǎi, guài

first tune

guāi

obedient; well-behaved 乖 guāi

clever and well-behaved; lovely and quick-witted 乖巧 guāi qiǎo
well-behaved 乖 guāi	clever 巧 qiǎo

third tune

guāi

swindle 拐 guǎi

crutch 枴 guǎi

fourth tune

guài

odd; demon 怪 guài

strange; peculiar 奇怪 qí guài
unusual; strange 奇 qí	odd 怪 guài

monster; demon 妖怪 yāo guài
evil spirits; demon 妖 yāo	demon 怪 guài