| Ka-uapameua. | It is/was as if she is/was seeing him. |
The Independent Indicative Present – Perceptive (#02) is always preceded by the particle ka-. It is used several ways. One is to describe things that happen in a dream or in a dream-like state.
| Ka-nimitshishunaua eukuan eshinaman. | I was eating in my dream. |
Another common usage is to create relative clauses of the type that one among others. In this case, the ka- is not optional.
| ne napeu ka-taua. | the man who was present. |
Link to the conjugation guide.