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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yuān, yuán, yuǎn, yuàn

first tune

yuān

abyss; deep pool deep; profound 淵 yuān

accuse wrongly injustice or wrong 冤 yuān

Chinese characters also pronunced yuān

second tune

yuán

dollar (money) beginning; original 元 yuán

original; former 原 yuán

source; origin 源 yuán

member trained personnel 員 yuán

circle 圓 yuán

garden; park 園 yuán

ape; anthropoid 猿 yuán

aid; help; rescue 援 yuán

serendipity affinity; rapport predestined relationship; relation of fate 緣 yuán

Chinese characters also pronunced yuán

third tune

yuǎn

far; faraway 遠 yuǎn

far and near 遠,近 yuǎn jìn
far 遠 yuǎn	near 近 jìn

fourth tune

yuàn

complain; resentment 怨 yuàn

wish; hope will; willing to 願 yuàn

willing to out of choice; approve of 願意 yuàn yì
willing to 願 yuàn	intention 意 yì

yard; courtyard hall; court; public building 院 yuàn

hospital 醫院 yī yuàn
medical 醫 yī	public building 院 yuàn

Chinese characters also pronunced yuàn