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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to link more related multi-character Chinese words!

cēng, céng, cěng, cèng

second tune

céng

ever; once 曾 céng

ever; once used to; had experience of 曾經 céng jīng
ever; once 曾 céng	experience 經 jīng

layer; coating 層 céng

fourth tune

cèng

rub against pace; walk slowly 蹭 cèng