 The two most common usages for the present continuous tense as it relates to speaking about things in the present We have actions in progress at the time of speaking Specifically right when it's being said so I can say I am teaching right now However, we also have actions in progress around the time of speaking I'm reading a good book Now, of course, I'm not reading a book just now But I started reading a book in the past. I am reading it Perhaps today at some time and I'll finish reading the book at some point in the future Again, I'm not doing it just now, but around the time of speaking There are additional usages for this tense But they're not as common as these two and I suggest you have a look in the materials for those further usages