Dear Duolingo, can you make a function to practice for an unlimited amount of time instead of having a timer or having to start over again after twenty sentences. A function where you just keep going until you press stop. Thanks
I think I got it.
Unlimited number of questions, (not just 20)
A stop button, (not a timer)
Every vocabulary word has to be used in two sentences, before you earn one coin (skill point). This also means every correct sentence is about half a coin, which is the same ratio as the normal 20 question practice.
The two sentences with the same key vocabulary word should not be spread too far apart, perhaps 5-7 sentences before you get the same word again
Example, I would do 50 sentences, get 25 skill points and refresh about 23 words or so
Well, in timed mode, it saves your progress whether you get 1 question right or all 20, and whether you get through all the questions or not. So I think Salfs is asking for a practice like that, where whenever you stop it saves your progress.
Personally I think it would be neat if there was an option for timed practice where it would run until you actually ran out of time, rather than stopping after 20 questions even when you have a lot of time left on the clock.
The untimed mode actually isn't unlimited practice. it consists of a set number of sentences and if you make more than 3 mistakes before you make it through all the sentences then you "lose" which means you stop that practice round and you don't get any skill points (unless this has changed recently).