Example: My dog (be) has been sick for three days.
Example: We (be) have been very worried about him.
Example: Jimmie (be) had been late to class five times before he got a detention.
Example: Mark (be) will have been to Paris four times is he goes there again this summer.

1) She (be) living in the United States for eight years.

2) I (be) studying English for two hours.

3) Dr. Lambert (be) a professor since he was thirty two years old.

4) Ricardo (be) to the doctor for his check-up. He doesn't need to go again.

5) We (be) swimming all day.

6) Mimi (be) full of energy since she woke up this morning.

7) The CD player (be) skipping since I bought it.

8) The magician (be) under water for six minutes if she can hold her breathe for thirty more seconds.

9) Before James moved away, he and Dahlila (be) friends for ten years. Dahlila was very upset when he left, and she (be) ever since.

10) Mariela (be) in math class for thirty minutes before she began to smell the smoke. When the fire trucks arrived, she knew she should evacuate the building.

11) You (be) here since lunch time.

12) Richard and Michelle (be) married for fifty years if they stay married for another three.