The perfective particle "shu" has an ample usage in everyday Kareyku. It's main function, as has been pointed out, is that of marking the perfective. It is mainly used with the past, but it can also be used with other tenses to give the idea that the action has been done entirely or has been done as a single complete event.
Also it can be used in composition with "yori" meaning "much, a lot" and in this case it has the meaning of "too much" and indicates that the grade of the adjective is excessive. In this case it denotes insatisfaction on the part of the speaker. As in these examples:
1. uwa yaran yori kolom shu.
[u.'wa ja.'ran yo.'ri ko.'lom ʃu]
"you are too phony for me"
It can even be used with some nouns, specially when talking about weather phenomena.
2. pokolyo yori are shu!
[po.ko.'ljo yo.'ri a.'re ʃu]
"It's too hot at home!"
The use of the many evidentials and particles may add different shades to the sentence, as in the case of the intensive particle "ya".
