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
Click the framed calligraphic Chinese symbol icons
to link more related multi-character Chinese words!

dū, dú, dǔ, dù

first tune

dū

supervise; oversee 督 dū

supervise 監督 jiān dū
watch; supervise 監 jiān	supervise; oversee 督 dū

big city 都 dū

capital city 首都 shǒu dū
head; first 首 shǒu	big city 都 dū

second tune

dú

poison 毒 dú

viper; poisonous snake 毒蛇 dú shé
poison 毒 dú	snake 蛇 shé

alone; solitary 獨 dú

independent 獨立 dú lì
alone 獨 dú	stand 立 lì

lonely; solitary 孤獨 gū dú
solitary 孤 gū	alone; solitary 獨 dú

read; study 讀 dú

reading 閱讀 yuè dú
read; review 閱 yuè	read 讀 dú

Chinese characters also pronunced dú

third tune

dǔ

obstruct; block 堵 dǔ

block up 堵住 dǔ zhù
obstruct; block 堵 dǔ	stop 住 zhù

gamble 賭 dǔ

casino; gambling house 賭場 dǔ chǎng
gamble 賭 dǔ	field; place 場 chǎng

serious; earnest sincere; true faithful; trustworthy; reliable 篤 dǔ

certain; confident calm and unhurried 篤定 dǔ dìng
serious; earnest 篤 dǔ	calm 定 dìng

believe firmly devoutly believe in 篤信 dǔ xìn
serious; faithful 篤 dǔ	believe 信 xìn

Chinese characters also pronunced dǔ

fourth tune

dù

belly; abdomen 肚 dù

stomach ache 肚子痛 dù zi tòng
stomach 肚子 dù zi	pain; ache 痛 tòng

pass; spend time 度 dù

go vacationing; enjoy a vacation 度假 dù jià
pass; spend time 度 dù	vacation 假 jià

cross river or ocean 渡 dù

ferry boat 渡船 dù chuán
cross river or ocean 渡 dù	boat 船 chuán

envy 妒 dù

jealousy; envious 妒忌 dù jì
envy 妒 dù	jealous 忌 jì

Chinese characters also pronunced dù