Unbounded successive-cyclic rightward DP-movement

•A parasitic gap is required for rightward DP-movement over certain clausal adjuncts.•The need to license the parasitic gap is motivating exceptional rightward movement.•It is potentially unbounded and potentially successive-cyclic rightward movement.

Larson (1989) noted that rightward movement of a DP past a clausal adjunct can necessitate a parasitic gap inside that clausal adjunct. This paper argues that rightward DP-movement beyond certain adjunct clauses is movement beyond typical Heavy-NP Shift that is licensed by the need to bind the parasitic gap. I show that this correctly predicts a number of observations concerning the exceptional nature of the rightward movement involved. In particular, parasitic gaps are able to license rightward movement that is potentially unbounded and successive-cyclic.