This is an exercise to practice everything in the Blue Box (forms and uses of the Present Perfect and Present Progressive, articles, prepositions, adjectives vs. adverbs, and since vs. for) If you would like to review anything first, please return to the grammar explanation pages.

For each item:
- click on one of the boxes
If you are right:
- the square beside the box gets an ":)" in it
If you are wrong:
- the square beside the box gets an "X" in it

You will see feedback here. The feedback will also instruct you on what you might want to review and practice in more detail. Please note the things you have problems with and then review them in the Grammar Explanations area and practice them with the other interactive exercises.