"Some trees are not green."

Translation: Manche Bäume sind nicht grün.

[LFG183608]

Why is 'etwas' not accepted? I.e. 'Etwas Bäume sind nicht grün'.

[Babakkarami_93]

'Etwas' is for uncountable nouns and 'manche' for countable nouns

[PeterM1993]

When to use Einige?

[Babakkarami_93]

I think einige, similar to manche, is used for countable nouns

[ed42]

I'm a little confused about the word order here. Would Manche Bäume sind grün nicht be correct also? It was not accepted.

[quis_lib_duo]

"nicht" likes to settle (directly) after conjugated verbs:

http://german.about.com/od/grammar/a/The-Position-Of-Nicht.htm

[mikelucas]

that what I put same result, I can't see why either.

[shara111111]

it does work because you are just stating the colour "green" <- its more like a noun here
your are not describing the trees eg. the "green trees" <- its more like an adjective then and it would be i think grune