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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gāo, gáo, gǎo, gào

first tune

gāo

high; tall 高 gāo

high and low 高,低 gāo dī
high 高 gāo	low 低 dī

tall and short 高,矮 gāo ǎi
tall 高 gāo	short 矮 ǎi

cakes; pastry 糕 gāo

cake 蛋糕 dàn gāo
egg 蛋 dàn	cakes; pastry 糕 gāo

cream; ointment 膏 gāo

toothpaste 牙膏 yá gāo
tooth 牙 yá	paste 膏 gāo

Chinese characters also pronunced gāo

third tune

gǎo

do; organize 搞 gǎo

do something wacky 搞怪 gǎo guài
do; organize 搞 gǎo	strange; odd 怪 guài

Chinese characters also pronunced gǎo

fourth tune

gào

tell sue 告 gào

tell lawsuit 告訴 gào sù
tell; sue 告 gào	tell; sue 訴 sù

Chinese characters also pronunced gào