Present Continuous

Sarah is in her car. She is on her way to work. She is driving to work. This means: she is driving now, at the time of speaking. This action is not finished. I am doing something = I'm in middle of doing something; I've started doing something and I haven't finished. Sometimes action is not happening at the time of speaking!'I am reading a really good book at the moment. It's about a man...' with today/this week/this year'You're working hard today.' changes happening around now, especially with verb:get change become increase rise fall grow improve begin start