喂 wèi — (interjection) hello; to feed (someone or some animal); hey; telephone greeting; to feed
每天早上,奶奶都会喂院子里的鸡。Měi tiān zǎo shang, nǎi nai dōu huì wèi yuàn zi lǐ de jī.Every morning, Grandma feeds the chickens in the yard.
Common words: 喂养 (wèi yǎng)、投喂 (tóu wèi)、喂料 (wèi liào)
哎 āi — an interjection; hey; lookout; why etc
哎,你怎么又把东西忘在家里了?Āi, nǐ zěn me yòu bǎ dōng xi wàng zài jiā lǐ le?Hey, how did you forget your things at home again?
Common words: 哎呀 (āi yā)、哎哟 (āi yō)、哎唷 (āi yō)
嘿,你们快过来看,这里有一只小松鼠!Hēi, nǐ men kuài guò lái kàn, zhè lǐ yǒu yì zhī xiǎo sōng shǔ!Hey, come and look, there is a little squirrel here!
Common words: 嘿嘿 (hēi hēi)、嘿咻 (hēi xiū)