Упражнение 1. Образуйте форму Present Perfect Continuous.

Решение:

Вставляем глаголы в форму Present Perfect Continuous (have/has + been + глагол-ing).

1. My sister has been studying for her exams since yesterday.
2. It has been raining all morning and the streets are wet.
3. You have been waiting here for long? No, just five minutes.
4. The children have not been listening to the teacher - they are talking.
5. I have been trying to call you for an hour! Why didn't you answer?
6. How long has he been learning to play the guitar?
7. She looks happy. She has been smiling all evening!
8. We have not been sleeping well since we moved to this flat.

Ответ: has been studying; has been raining; have been waiting; have not been listening; have been trying; has he been learning; has been smiling; have not been sleeping.