I saw him cross the road.
Is cross the road the object of saw? Or is it the complement of him?
In this sentence,
Such phrases take the general form:
The object here is clearly
As far as I'm aware, the "objective complement" is a rather peculiar construct to the English language. Other European languages (I can vouch for French and Spanish at least) require a separate clause, something akin to
A verb (cross) cannot be the object.
Break the statement into smaller pieces and the true object becomes more obvious:
'I' subject, 'saw' verb, 'him' accusative object
crossing is a separate activity to the seeing