It is similar to verb phrase ellipsis ( VP - ellipsis ) insofar as the ellipsis is introduced by an auxiliary verb .
Many grammarians take it to be a particular type of VP - ellipsis .
It is similar to verb phrase ellipsis ( VP - ellipsis ) insofar as the ellipsis is introduced by an auxiliary verb , and many grammarians take it to be a particular type of VP - ellipsis .