I certainly understand why every correct answer isn't captured immediately. But assuming that the people commenting that a correct version should be accepted are also reporting it, it should be picked up over time. Certainly within a year. And they shouldn't just turn off the reporting button.
"there are" can be contracted contracted to "there's", but for some reason duolingo never accepts this contraction. And since this is how I would normally talk, I always put this without thinking and get marked wrong.
Also I know people are gonna be like tHaTs NoT gRaMmAtTiCaLlY cOrReCt. But seriously, this is a very normal way to speak irl. It should be accepted.
why is there no topic marker here, unlike in another similar example?
There is a pencil inside the box. = 상자 안에는 연필이 있습니다.
it's the exact same kind of structure. i'm guessing 는 is left out because we were told it frequently is, but i don't remember if that's only in colloquial speech or written too