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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hōu, hóu, hǒu, hòu

second tune

hóu

monkey 猴 hóu

monkey 猴子 hóu zi
monkey 猴 hóu	suffix 子 zi

throat 喉 hóu

throat 喉嚨 hóu lóng
throat 喉 hóu	throat 嚨 lóng

Chinese characters also pronunced hóu

third tune

hǒu

roar; howl 吼 hǒu

roar of a lion 獅吼 shī hǒu
lion 獅 shī	roar 吼 hǒu

fourth tune

hòu

queen 后 hòu

queen 皇后 huáng hòu
emperor 皇 huáng	queen 后 hòu

after; behind 後 hòu

before and after; front and behind 前,後 qián hòu
before; front 前 qián	after; behind 後 hòu

thick, thickness 厚 hòu

thick and thin 厚,薄 hòu báo
thick 厚 hòu	thin 薄 báo

Chinese characters also pronunced hòu