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!

ōu, óu, ǒu, òu

first tune

ōu

Europe 歐 ōu

Euro (currency) 歐元 ōu yuán
Europe 歐 ōu	dollar 元 yuán

gull; sea birds 鷗 ōu

gull; seagull 海鷗 hǎi ōu
sea 海 hǎi	gull 鷗 ōu

Chinese characters also pronunced ōu

third tune

ǒu

mate; idol; puppet even number coincidentally; occasionally 偶 ǒu

spouse 配偶 pèi ǒu
match; to pair 配 pèi	mate 偶 ǒu

even numbers 偶數 ǒu shù
even number 偶 ǒu	numbers 數 shù

idol greatly admired person 偶像 ǒu xiàng
idol 偶 ǒu	figure; image 像 xiàng

fortuitous; occasionally unexpectedly; happening by chance 偶然 ǒu rán
occasionally 偶 ǒu	like that 然 rán

Chinese characters also pronunced ǒu