一会儿我下楼去拿。英语如何说呢

一会儿我下楼去拿.
I will go downstairs to get it in a short minute.
我是英语教师，不明可再问。

I'll soon get downstairs and pick it up.

I will go downstairs to get it in a short time.
或 I will go downstairs to get it in a minute.
不过你最好能给出一下上下文，看看到底那什么东西，才好给出更准确的翻译。如果要拿的东西是复数，就把it 换成them.

I will go downstairs to get it later.

I'll go downstairs and fetch it soon.

I'll get it downstairs soon.