1 We have been knowing each other since we were children.

2 The children have played computer game for two hours.

3 Has your sister been having that hairstyle for a long time?

4 I have been loving her from the first day we met

5 My intenet connection have not been working since yesterday.

6 How long have you waited?

7 I have been a teacher for three years

8 It has been snowing this morning

9 Sam has not studied enough recently

10 Have you been living in London for a long time?