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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rī, rí, rǐ, rì

fourth tune

rì

sun; day 日 rì

day and night 日夜 rì yè
day 日 rì	night 夜 yè

sun and moon 日月 rì yuè
sun 日 rì	moon 月 yuè