Write the sentences with the present perfect and for or since. 1 i/live here/2 months 2 i/work these/over two years 3 we/help thousands of young people/1998 4 i/know peter/last april 5 they/not go/to the beach/they arrived 6 we/be/her/three hours

1.I have lived here for 2 months/
2.I have worked these over for two years.
3.We have helped thousands of young people since 1998.
4.I have known Peter since last April.
5.They haven't gone to the beach since they arriveed.
6.We have been here  for three hours.