Present Pefect Simple and Continuous

Check the differences between these two tenses.

When you use the Present Perfect Continuous the consequences of the action are present right now.

Eg. A: You look terribly tired!

       B: Yes, I've been studying all night long.

*Read pages 54, 55, 56, 57, 58 and 59 in your books and do the exercises. Let me know if you have doubts or problems.