I wrote: "our horse is again ill" and it is not accepted. I guess, because of the word order. I am not a native speaker of English, but I have just found out, that even Mary Shelley wrote this: "I am again ill, as I was this morning". Yes, it might be a bit odd, but Duolingo should teach me Turkish constructions, not English word order. It should be accepted. I hate, when my "beat the clock" session fails because of such things.
I, again, have to contradict. Sorry. Native people do say such sentences sometimes, even if they are a bit substandard. But Duolingo should not be an advocate of prescriptive grammar, rather the descriptive one. At least when it teaches another language, not English. It frustrates me when I know that I understood the Turkish sentence correctly, but I don't get my well-deserved point (or what's worse, I fail in the "beat the clock" session) because of that. While all sorts of typos are accepted: the other day I wrote "Greace is next to Turkey" and it was accepted. However, spelling Greece wrongly is a much bigger mistake than messing up the word order a bit, creating substandard sentences that completely make sense and NO native English speaker would correct them in real life, unless they're proofreading my academic papers... I deserve my XP points! :(