I have some question about present continuous. My text book was written like this. The present continuous is used that sometimes the action is not happening at the time of speaking. For example, Steve is talking to a friend on the phone. He says. I'm reading a really good book at the moment. It's about a man who...
Steve is not reading a book at the time of speaking.
at here, I don't understand the usage. How can I understand as to this usages? What does this implies ? Just it emphasis? Or just boast of himself?
Actually I can't understand when do I use this usages?
for another example, Kate wants to work Italy, so she is learning Italian.(but perhaps she isn't learning Italian at the time of speaking) Ok. Then what does it want to expression? Why this sentence used by -ing ?