What is the difference in nuance between きのう、何をしていた。 vs きのう、何をした。? To be fair, I can't really tell the difference between these two english sentences: What were you doing yesterday ? What did you do ...
In another forum, someone said the difference between 誰が盗んだのか、誰か知りませんか。 and 誰が盗んだか、誰か知りませんか。 is that the former has more emphasis on the verb 盗む. Another person said that that's not the ...