The structure 再…，就…
"If...again, then..."
The structure 再…，就… 
is used to express that if an action or event is repeated, there will be certain consequences.
There can be either one or two subjects in these sentences. The subject(s) are placed before each part of the structure.
is used to express that if an action or event is repeated, there will be certain consequences.
There can be either one or two subjects in these sentences. The subject(s) are placed before each part of the structure.Scheme
subj. 1
再
action/event
(subj.2)
就
result
Pay attention
要是 is often followed by 就.
is often followed by 就.
Examples
你再不注意身体，就得住院了
If you don’t monitor your health, you will have to be hospitalized
nǐ zài bú zhùyì shēntǐ, jiù dé zhùyuàn le
他要是再搅扰你，就告诉我
If he bothers you again, let me know
tā yàoshi zài jiǎorǎo nǐ, jiù gàosù wǒ
你要是再这样，我就揍你
If you do it again, I will beat you
nǐ yàoshi zài zhèyàng, wǒ jiù zòu nǐ