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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pō, pó, pǒ, pò

first tune

pō

slope; hillside 坡 pō

Chinese characters also pronunced pō

second tune

pó

old lady; grandmother 婆 pó

maternal grandmother Your mother's mother 外婆 wài pó
outer 外 wài	grandmother 婆 pó

third tune

pǒ

quite; rather; considerably 頗 pǒ

Chinese characters also pronunced pǒ

fourth tune

pò

break; broken 破 pò

break record record-breaking 破紀錄 pò jì-lù
break 破 pò	record 紀錄 jì-lù

compel force someone to do something urgent, pressing 迫 pò

soul vigor; spirit 魄 pò

daring; vigor boldness of vision; breadth of spirit 氣魄 qì pò
air; spirit 氣 qì	vigor; spirit 魄 pò

Chinese characters also pronunced pò