It's a grammatical lesson about auxiliary verbs (be/ have/do) with short, full, and interrogative forms. It's a quick reminder for the beginners with a few examples to illustrate the grid. - ESL worksheets
![Avatar](https://cdn.statically.io/img/i.pinimg.com/140x140_RS/74/f0/47/74f047929dc41dcd71745d67aeeab19b.jpg)
Daniela Chaves