Слово are это глагол-связка а при вопросительном предложении are is am входят в начало предложения
1.what have you been doing here since morning? что ты делаешь здесь с самого утра?
2.he ran for,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, он бежал 10 мин без остановки (отдыха)
3.did you find your notebook? NO, I've been looking for it for 2 hours already but i haven't find it yet.
4 I'VE been waiting for you.................
5/ Ann has been reading....................
6. i have been writing a letter......
7 we have known each other................
8 they didn't sleep.........