Напишите глагол в Present Perfect Continuous Tense
1.My sister....(work) here for over six years.
2.My brother....(swim) in this lake since she was a child.
3.How long...you(take care) of this injured bird?
4.They....(study) very hard for their exams.
5.The government...(try) to reduce pollution for years.
6.You look tired.You....(work) in the garden al afternoon.
7.We....(use) solar power for ten years now.