4. The boys have been playing football for 2 hours.
5. Jenny has been writing cards since 2 o'clock p. m.
7. Susan has been doing her bedroom since morning.
8. We have been learning English for six years.
9. Mum has been cooking for two hours.
10. Dad has been watering the apple trees since 11 a.m.
11. My sister has been making a new dress since Tuesday.
Объяснение:
Present Perfect Progressive образуется с вс глагола to be в форме Present Perfect (have been, has been) и формы причастия настоящего времени (Present Participle) смыслового глагола.
