This is so meta

Are you being meta Duolingo?

tru af

Why was my answer wrong?????!!!!!6)$+[^!4}√%{π¢{π€{^%]™<+'($&*! 多邻国为什么？

how would you know whether it is past or present tense?

why do you need the "de" at the end. i know the shi de constructor but i thought the de was optional

...but it wasn't.