I wish that my grandfather would leave the bedroom, go to the kitchen sometimes, be at the house. I find that the repetition of this exact phrase with no variance allows me to skip over "ka lumi moe" and not register it as the bedroom because where else would grandpa be? According to this lesson, that's it. Grandpa is in the bedroom forever.
I wish Duolingo would not use contractions in their prompts and responses. Particularly, the apostrophe-s to contract the subject with the word "is." In good English writing style, contractions should be eliminated in print when not marking a possessive. End of rant. Sorry.
The way I understand it, "ma" is only used to indicate where something is in space - so "in" or "on" and also "at" when used to indicate a stationary location (I'm not sure if it can also be used for "by" and also when it can or can't be used for time). On the other hand "i" can have all those meanings plus also indicate direction of motion, so "to", "at" (when indicating direction, like "he threw it at her", or time).
Right. "Aia" marks the sentence as identifying something being at a particular location in space or time. In English we use "is" for that sort of thing, but "aia" has a more specific meaning and is not the same as "is". Also, in some sentences "aia" is more conveniently translated as "there is".