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
Click the framed calligraphic Chinese symbol icons
to link more related multi-character Chinese words!

hāi, hái, hǎi, hài

second tune

hái

child 孩 hái

child; little child 小孩 xiǎo hái
little 小 xiǎo	child 孩 hái

Chinese characters also pronunced hái

third tune

hǎi

sea; ocean 海 hǎi

sea; ocean 大海 dà hǎi
big; great 大 dà	sea; ocean 海 hǎi

Chinese characters also pronunced hǎi

fourth tune

hài

harm; to injure suffer from (a disease) 害 hài

pest; harmful insect 害蟲 hài chóng
harm; to injure 害 hài	bug; insect 蟲 chóng

scared; dread 害怕 hài pà
suffer from 害 hài	afraid; scare 怕 pà

Chinese characters also pronunced hài