The most important usage about 就 may be the sentence pattern: 一 …… 就……
This pattern tells us that as soon as (一, yī) one thing happened, then (就, jiù) another thing happened immediately afterwards.
wǒ yí dào shànghǎi , jiù gěi nǐ diànhuà
I will give you a phone call as soon as I arrive Shanghai.
tā hěn hàixiū, yì jiǎng huà jiù liǎn hóng
She is very shy. She blushes whenever she talks.
邓丽君, also known as Teresa Teng (January 29, 1953 – May 8, 1995), an icon in Southeast Asia pop music history, was a pop singer from Taiwan. She was well known for her folk songs and romantic ballads.
One of her most popular song is 我一见你就笑
It goes like this.
wǒ yí jiàn nǐ jiù xiào , nǐ nà piān piān fēngcǎi tài měi miào , gēn nǐ zài yì qǐ, yǒng yuǎn méi fánnǎo
I smile whenever I see you. Your graceful bearing is so elegant. I will always be happy as long as I am with you.