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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gān, gán, gǎn, gàn

first tune

gān

involved 干 gān

interfere 干擾 gān rǎo
involved 干 gān	disturb 擾 rǎo

liver 肝 gān

sweet voluntary 甘 gān

sweet and refreshing 甘美 gān měi
sweet 甘 gān	beautiful 美 měi

willingly; voluntarily 甘心 gān xīn
voluntary 甘 gān	heart 心 xīn

Chinese characters also pronunced gān

third tune

gǎn

dare to 敢 gǎn

brave; courageous 勇敢 yǒng gǎn
brave 勇 yǒng	dare to 敢 gǎn

feel; sense 感 gǎn

feeling; sense 感覺 gǎn jué
feel; sense 感 gǎn	sense 覺 jué

Chinese characters also pronunced gǎn

fourth tune

gàn

work; fight 幹 gàn

work hard; slave away at work 苦幹 kǔ gàn
bitter; painful 苦 kǔ	work; fight 幹 gàn