@domo I'm surprised you didn't mention the d/t thing as the problem, as that's the one that trips up even most Dutch people for their entire lives 🙂

There are some other 'fun' ones, like the two different articles: eg. "de krat" vs. "het krat" which are both correct, but for most words, only one of the two is correct!

I'm curious what specific issue you have with the past tense? I'm a native Dutch speaker, so possibly there's something there that I never noticed.

(Aside, the water thing would be "geen water", rather than "green water" :p)