1 example from real videos — listen, replay, loop.
Remember in our proto-language we had those passive and causative constructions? Well the same thing could happen to them. Over time they become attached to the main verb and form into suffixes, giving us a morphological passive and causative. And there's no need to stop there; There are many other verbs that can take on auxiliary meanings before getting sucked into the main verb.
How to Make a Language - Part 7: Grammatical Evolution
Remember in our proto-language we had those passive and causative constructions? Well the same thing could happen to them. Over time they become attached to the main verb and form into suffixes, giving us a morphological passive and causative. And there's no need to stop there; There are many other verbs that can take on auxiliary meanings before getting sucked into the main verb.
How to Make a Language - Part 7: Grammatical Evolution