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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nōng, nóng, nǒng, nòng

second tune

nóng

farmer; peasant farming; agriculture 農 nóng

peasant; farmer; husbandman 農夫 nóng fū
farming 農 nóng	man 夫 fū

thick; dense; concentrated 濃 nóng

thick or thin; light or heavy dense or sparse; concentrated or dilute 濃,淡 nóng dàn
thick; dense 濃 nóng	thin; sparse 淡 dàn

Chinese characters also pronunced nóng

fourth tune

nòng

handle; perform tease; make fun of 弄 nòng

err; go wrong make a mistake 弄錯 nòng cuò
handle 弄 nòng	wrong; mistake 錯 cuò

tease; make fun of tickle with fingers 逗弄 dòu nòng
tease; play with 逗 dòu	tease; make fun of 弄 nòng