How do I create a "repeating table" like InfoPath?

[Auslegung]

I have a few tables with only 2 columns in them: a header and the body. The user will need the ability to add rows beneath the last row in the body, that repeat the content controls from the row above them (not the data that is in the content controls, just the content controls themselves). This is incredibly simple to do in InfoPath, but I've found it impossible in Word. How can I do this? Thank you!