1. äsken puhunut mies="the man who has just talked"....this seems correct to me....the man did the talking...
2. syönyt omena="the eaten apple" ....this seems incorrect, as though the apple did the eating..I would think only the passive past participle would make sense here...syöty omena....
3. tehnyt tehtävä="the done task" ....same thing here...as though the task did itself...surely it should be tehty tehtävä
4. nukkunut lapsi="the child that has slept"....this example seems correct to me...
5.saanut kirje="the received letter"....and again the letter seems to be receving itself...the correct version could only be...saatu kirje...
So...am I missing something??.... before I say anything critical about what I have otherwise found to be a very helpful site, I want to make sure that I know what I'm talking about...
