just now 到底该连用什么时态，主要取决于它表示什么意思（有时还可能涉及句子语境）。

1. 表示“刚刚”“刚才”，通常与过去时连用，且一般应放在句末。如：

I saw her just now. 我刚刚见到过她。

I told you a lie just now. 我刚才对你撒谎了。

I telephoned Ann just now. 我刚才给安打过电话。

You looked pretty upset just now. 你刚才看上去挺难过的。

I’m sorry if I interrupted you just now. 要是刚才我打断了你的话，非常抱歉。

Where have my glasses gone? I had them just now. 我的眼镜哪里去了？我刚才还戴着呢。

有时并非直接连用过去时态，也可能连用“情态动词+完成式动词”。如：

It really is desperately unfortunate that this should have happened just now. 刚才竟发生这样的事儿，实在是太不合时宜了。

注意，just now 即使是表示“刚才”，如果它不是修饰动词，自然不一定连用过去时态。如：

I apologize for my outburst just now. 我为刚才乱发脾气（向你）道歉。

2. 表示“眼下”“此刻”“现在”“马上”等，是 now的加强说法；此时句子不用过去时态。如：

I’m a little low on funds just now. 我目前手头有点拮据。

I haven’t time to stop and talk just now. 我这会儿没时间停下来说话。

Short skirts are very much in vogue just now. 短裙目前非常流行。

She’s not in just now. Can I take a message? 她现在不在家。需要我传个话吗?

I’d offer to help, only I’m really busy just now. 我是想帮你的，但眼下我实在很忙。

We are having dinner just now—can you come back later? 我们此刻正在吃饭，你能待一会再来吗？