what I need is a website which tests me on if I can describe and explain how the Present Progressive is used.
I'm not sure how that is going to work. 'to describe' the function of the Progresssive and why it would be used, and how it varies from Present tense, is qualitative, not like the website objective tests that let you choose an answer in some way.
You will have to do it with your students - why not 'tell us' and we'll comment.
- For Teachers