Who can explain me how to use "就"?
就


means emphasize,can translate as "just", for example, "我就是不想去"(I just don't want to go!), used mostly.
means under some condition, once, for example ,"我一吃海鲜就想吐"(I will get a sick once I eat seafood.), used frequencely.
means relying on or with, for example, "就着菜吃饭"(Eating rice with a dish.)
means successful ,like "一蹴而就"(Success at once.), rarely used.


That's all I understood for experience.