present perfect continuous memakai kata how

1. How long have you been living here?
2. How long has she been standing there?
3. How long have they been playing football?
4. How long has he been waiting for her?
5. How long have you been studying English?
6. How long has the doctor been examining him?
7. How long have the boys been watching TV?
8. How long has the baby been sleeping?
9. How long has Mr smith been working in that bank?
10. How long have the Jones been trying for a baby?