"My older brother will be in the hospital this weekend."
I was always taught that "time words" could go before or after the subject in the sentence, e.g. 这个周末我的哥哥在医院。Additionally, the English sentence is in the future tense and the "correct answer" seems to be in the present tense.
Yes, you can do it, but Duo only accepts that syntax; it only allows noun-time-whatever. I reported it. The course has many errors.
Still, it's a good start. I'm glad that they finally added Chinese. I'm not a native speaker, but I also agree that the answer can be either.
As I understand it, the time (this weekend) is what indicates the "future" tense.
I asked a similar question below. "在" means "at," and in a non-literal sense "is at" (i.e. "I'm at home," "我在家"). I think the time itself ("這個週末", "this weekend") is enough to express future tense, but I myself would've stuck a "會" before the "在", lol.
If i have one complaint its that whatever symbols are offered in the solution can't be checked. I recognize the symbol, and know how they sound, but often don't know or remember the meaning.
If you are using the Chrome browser the Zhongwen dictionary extension is great. You just hover over any symbol for the pinyin and the dictionary meaning(s)
In English they are saying 'will be' and not using 会 huì - future tense/action
I don't understand why people want to use 會 in this sentence. That indicates ability -- "can be at the hospital"
Your use of the 会 is correct, but it can also mean the future tense "will." A sentence like “你明天会不会见你的妈妈,” would mean "Will you see your mom tomorrow?" I hope that helps!
我的哥哥在这个周末在医院。 I don't understand why Duo often counts things wrong when adding 在 in front of time. You need a preposition there, that's how I was taught. It can be optional, you don't HAVE to have it, but it isn't incorrect.