I wish they had a favourites feature on Duolingo, like if you would like to revise particular sentences later outside of their lesson, you could just have them all in one place.
I recommend using Anki to do that. Really good app for making your own flash cards.
Just, how, according to you would be suffice
It doesn't fit American English either, according to me, that is. :)
This sentence does not read well in Australia.
A preferred translation would be "How do you see it?"
As of Feb 2021, "How do you think?" is rejected, but "What is your opinion?" is accepted.
Why how is it? And not how is that
That corresponds to the Dutch conjunction "volgens", also akin to the verb "volgen" to follow. Nice.