Is 我一分钟以前刚刚看到他 grammatically correct? I'm practicing with the words 以前 and 以后.
Using the word 以前, I came up with this sentence:


  我一分钟以前刚刚看到他！


My English intention was to make this sentence:


  I just saw him a minute ago!


I was told the format of using this word with time words was this:
time word + 以前 + following action
So to break up the sentence I made:
[我]一分钟 + 以前 + 刚刚看到他
I'm not sure if 刚刚 is actually separate from 以前.
Sure, but you'd better use 之前 in this case.