I don't think it would be too impossible to make "Grammar" questions in the style as JCJP's Vocabulary and Kanji questions.
The questions could be like this: "topic particle", with this choice of answers: A) わ, B) が, C) は, D) か.
Or questions like this: "has been eaten", with answers: A) たべた, B) たべていた, C) たべられた D) たべられていた.
Or you could have questions that are full sentences but with a part blanked out, and the user has to pick the grammatically correct missing particle / word / auxiliary / inflection / suffix / etc. For example:
"私は本__読みます", with answers: A) こと, B) の, C) を, D) に
The main difficulty is, as OwlPrincess mentioned, making it so that it's not repetitive. There would have to be a variety of randomised alternate words to stop users getting bored reading the same set phrases over and over, and also to prevent users just matching questions and answers through visual memory.
November 15, 2015 at 3:21am