just now有几个意思
just now表示“刚刚”“刚才”，通常与过去时连用，且一般应放在句末。如：
He came back just now. 他刚刚回来。
I saw her in the street just now. 我刚才在街上见到她。
Did you hear a strange noise just now? 你刚才听见一种奇怪的声音了吗?
just now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 happy just now. 我现在很幸福。
I don’t think it wise to ask for a loan just now. 我认为现在提出借贷不明智。
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?
