to describe something before and after the moment of speaking present continuous to describe things that are generally true present simple to describe something happening continually in the present present simple to describe something we are not sure about modal to describe something happening regularly in the present present simple to describe a temporary situation present continuous to describe something happening before and after a given time present continuous https://339efcb25eb75e967b0d-ff8eeadd950d51fd1fc939dca75b3973.ssl.cf1.rackcdn.com/assets_green.swf