In the tanach, there are times when certain words are doubled (generally verbs but I'm open to other combinations) with one form of the word, followed by a second form which is in a future tense, I think. The fact that the words are doubled often opens the text up to exegetical understanding, the way the Ramban understands Bereishit 2:17.
I am trying to get a list of all instances like this to see if there is a consistent interpretive approach. So far, I have sh-ch-kh, a-b-d, m-t, h-r-g, z-ch-r, m-kh-h, kh-r-sh as roots to which this occurs, but is there a comprehensive list already available so I can start reviewing the verses?