一定 一定
“Of course.”
THE DIALOGUE REEL
“please look out for her.”
一定 一定
“Of course.”
什么时候去
“When are you leaving?”
Direct spoken expression in this communicative setting.
When someone entrusts a loved one to your care, answering with repeated assurances like '一定一定' signals trustworthiness and mutual social obligation (renqing).
LEARNING CHUNKS & PARTICLES
definitely / for sure / without fail
Duplicated as '一定一定' to show earnestness and politeness when accepting a social favor or request.