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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kuān, kuán, kuǎn, kuàn

first tune

kuān

wide; broad relax; relieve 寬 kuān

wide and narrow 寬,窄 kuān zhǎi
wide; broad 寬 kuān	narrow 窄 zhǎi

relieved free from worry awkwardness 寬心 kuān xīn
relax; relieve 寬 kuān	heart 心 xīn

third tune

kuǎn

money; funds entertain; treat well 款 kuǎn

loan 貸款 dài kuǎn
loan; borrow 貸 dài	money; funds 款 kuǎn

treat or entertain hospitably 款待 kuǎn dài
treat well 款 kuǎn	treat 待 dài