Answer:

5 sentences using Present Perfect Continuous:

1. I have been studying for my exam for the past two hours.

2. They have been working on this project since last month.

3. She has been practicing her speech for hours.

4. He has been playing basketball with his friends all afternoon.

5. We have been planning our vacation for weeks.

5 sentences using Past Perfect Continuous:

1. She had been waiting in line for two hours before the store opened.

2. They had been traveling for days before they finally arrived.

3. He had been studying for his test for weeks before he felt confident.

4. We had been walking for hours before we reached the summit.

5. The car had been making strange noises for a few weeks before it finally broke down.

5 sentences using Future Perfect Continuous:

1. By next year, I will have been working for this company for a decade.

2. They will have been attending the school for six years when they graduate.

3. He will have been preparing for the competition for months by the time it starts.

4. By this time next week, we will have been living in our new apartment for a month.

5. The project will have been ongoing for a year when it is completed.