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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wēi, wéi, wěi, wèi

first tune

wēi

might; majesty; imposing power and prestige; powerful and influence 威 wēi

Chinese characters also pronunced wēi

second tune

wéi

danger; dangerous 危 wéi

only 唯 wéi

maintain; preserve 維 wéi

do; act 為 wéi

surround; besiege; encircle; enclose 圍 wéi

violate; disobey 違 wéi

tiny; slight 微 wéi

breeze; gentle wind 微風 wéi fēng
tiny; slight 微 wéi	wind 風 fēng

Chinese characters also pronunced wéi

third tune

wěi

tail; rear 尾 wěi

great; mighty 偉 wěi

tuna (fish) 鮪 wěi

Chinese characters also pronunced wěi

fourth tune

wèi

seat; position 位 wèi

stomach (organ) 胃 wèi

guard; defend 衛 wèi

feed 餵 wèi

console; comfort pacify; soothe; feel relieved 慰 wèi

not; not yet 未 wèi

future; in the future 未來 wèi lái
not yet 未 wèi	coming 來 lái

taste; flavor aroma; oder; smell 味 wèi

for 為 wèi

Why? for what reason 為什麼 wèi shé me
for 為 wèi	what 什麼 shé me

Chinese characters also pronunced wèi