我一直工作到凌晨5点，这句怎么翻译成英语，用什么时态比较好？

I had been working until 5:00a.m.
用过去完成进行时。

I did not stop working until 5 o'clock.
时态你说的是过去的事情就这样用。
如果是作保证I will not stop working until 5 o'clock.
否定+until 中学英语常用句型，要熟练掌握

I have been working to 5:00

I was working till five o'clock A.M.

用过去进行时来表示在过去某段特定时间里正在做的事情。

sorry!

I had been working until 5:00am(用过去完成进行时)