Errors in ellipsis occur chiefly with prepositions.
His objection and condoning of the boy's course, seemed to
say the least, paradoxical.
(The preposition to should come after
Many men of brilliant parts are crushed by force of
circumstances and their genius forever lost to the world.
(Some maintain that the missing verb after genius is
are, but such is ungrammatical. In such cases the right verb should be
always expressed: as—their genius is forever lost to the