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!

kāi, kái, kǎi, kài

first tune

kāi

open; turn on 開 kāi

open and close turn on and turn off 開,關 kāi guān
open; turn on 開 kāi	close; turn off 關 guān

open the door 開門 kāi mén
open 開 kāi	door 門 mén

happy; joyful 開心 kāi xīn
open 開 kāi	heart 心 xīn

Chinese characters also pronunced kāi

third tune

kǎi

victory; triumph 凱 kǎi

triumphant return; return in triumph 凱旋 kǎi xuán
victory; triumph 凱 kǎi	return 旋 xuán

model; standard 楷 kǎi

model to follow; good example 楷模 kǎi mó
model; standard 楷 kǎi	mold; standard 模 mó

indignant; sad generous; magnanimous 慨 kǎi

sigh with sorrow, regret 感慨 gǎn kǎi
feel; sense 感 gǎn	indignant; sad 慨 kǎi

generous; liberal with money 慷慨 kāng kǎi
generous; liberal 慷 kāng	generous 慨 kǎi

Chinese characters also pronunced kǎi

fourth tune

kài

deeply touched; sigh emotionally 慨 kài

anger; hatred 愾 kài

anger against a common enemy joined in opposition to the same adversary (Chinese idiom) 同仇敵愾 tóng chóu dí kài
same 同 tóng	enemy 仇 chóu	enemy; oppose 敵 dí	anger 愾 kài

Chinese characters also pronunced kài