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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chēn, chén, chěn, chèn

first tune

chēn

annoyed with 嗔 chēn

angry; displeased 瞋 chēn

second tune

chén

Chen, Chinese surname 陳 chén

sink; heavy 沈 chén

weighty; oppressive 沈重 chén zhòng
sink; heavy 沈 chén	heavy 重 zhòng

morning 晨 chén

morning 早晨 zǎo chén
early 早 zǎo	morning 晨 chén

Chinese characters also pronunced chén

fourth tune

chèn

avail an opportunity 趁 chèn

seize an opportunity 趁機 chèn jī
avail an opportunity 趁 chèn	chance; opportunity 機 jī

fit; suitable 稱 chèn

symmetry; symmetrical 對稱 duì chèn
pair 對 duì	fit 稱 chèn

gratifying and satisfactory have what one wishes 稱心如意 chèng xīn rú yì
fit 稱 chèng	heart 心 xīn	as one wishes 如意 rú yì

Chinese characters also pronunced chèn