例： I'm busy just now．我现在很忙。
I'll tell you a story just now if you have time to listen to it．
just now 有三种含义：
1、at this moment 此时、此刻、眼下
Come and see me later, I'm busy just now! 过些时候再来，我这会儿正忙着呢！
2、during this present period 目前；现阶段
Business is good just mow. 目前生意很红火。
3、onlu a short time ago 刚才；刚刚；一会儿前
I saw her just now. 我刚刚见到过她。
注：just一般不用于否定形式！