8.3 The Gerund
The analysis of (96a) and (b) are fairly straightforward. In both cases the nominalising ing is inserted above the relevant aspectual morpheme, taking the vP that it heads as a complement. The verb will move to support the lower morpheme, i.e. the aspectual which will leave ing unsupported. As it is a bound morpheme this will trigger the insertion of an auxiliary to bind it. The choice of the auxiliary will, as usual, be determined by the lower aspectual morpheme: