Exercise 3. write sentences in present perfect continuous. 1. the cat / the mouse / chase 2. you / the homework / copy 3. they / a new gadget / invent 4. we / in a forum / chat / not 5. lucy / on the task / concentrate / not

1. The cat has been chasing the mouse.
2. You've been copying the homework.
3. They've been inventing a new gadget.
4. We've not been chating in a forum.
5. Lucy has not concentrating on the task.

1. The cat has been chasing the mouse.   2. You have been copying the homework.  3. They have been inventing a new gadget.  4. We have not been chating in a forum.  5. Lucy has not concentrating on the task.