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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zuō, zuó, zuǒ, zuò

second tune

zuó

past; yesterday 昨 zuó

yesterday 昨天 zuó tiān
past; yesterday 昨 zuó	day 天 tiān

third tune

zuǒ

left side 左 zuǒ

assist; assistant 佐 zuǒ

seasoning; flavoring; condiments 佐料 zuǒ liào
assist; assistant 佐 zuǒ	material 料 liào

fourth tune

zuò

sit 坐 zuò

seat base; stand 座 zuò

do; act; make 做 zuò

do; make write; compose 作 zuò

author writer of a book 作者 zuò zhě
write; compose 作 zuò	person 者 zhě

Chinese characters also pronunced zuò