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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kōng, kóng, kǒng, kòng

first tune

kōng

empty; hollow sky; air 空 kōng

air (breathing) 空氣 kōng qì
empty; hollow 空 kōng	air; gas 氣 qì

sky; heavens 天空 tiān kōng
sky; heaven 天 tiān	sky; air 空 kōng

third tune

kǒng

hole; aperture 孔 kǒng

punch a hole 打孔 dǎ kǒng
punch 打 dǎ	hole 孔 kǒng

fear; dread 恐 kǒng

terror; horror 恐怖 kǒng bù
fear; dread 恐 kǒng	terror 怖 bù

dinosaur 恐龍 kǒng lóng
fear; dread 恐 kǒng	dragon 龍 lóng

fourth tune

kòng

vacant; unoccupied 空 kòng

have time (to do something) 有空 yǒu kòng
have 有 yǒu	unoccupied 空 kòng

don't have time (to do something) 沒空 méi kòng
without 沒 méi	unoccupied 空 kòng

control accuse 控 kòng

control 控制 kòng zhì
control 控 kòng	control 制 zhì

accuse 控訴 kòng sù
accuse 控 kòng	tell; sue 訴 sù