just now是一般过去时态的标志。just now有三种含义：

1、at this moment此时、此刻、眼下；

2、during this present period目前，现阶段；

3、only a short time ago刚才，刚刚，一会儿前。

例句

mr goldsworth is not available just now.

戈兹沃斯先生这会儿没时间。

just now i thought i saw someone.

我想我刚才看到了什么人。

"he rang me just now,"she interposed.

“他刚刚给我打过电话，”她插嘴说。

you were rude to say that to your father just now.

你刚才对你父亲讲那种话太不礼貌了.