she just gone

she just gone 是错误的,过去分词怎么能直接做谓语呢?
She just left.
She just went out.

she just has gone. 或
She has just gone.完成时,她刚走

你的问题
what's the each meaning
是错误的,要说
What's the meaning of each.

她走了。她就这样走了。

the former one is not right,but the second one is not wrong~.~

she just gone .她刚走了.
she just has gone. 她就这样走了.just在这里是"只是, 仅仅"的意思,起强调作用.

附上:
just
adv.
正好, 恰好
The coat is just the right size.
这件上衣的大小正好合适。
只是, 仅仅
刚才, 方才
I just saw your sister standing over there.
我刚才看见你妹妹站在那边。
勉强地
We have only just enough milk to last till Friday.
我们现有的牛奶勉强可以维持到星期五。
只好
The door just opens.
门只好开着。