Correct the mistakes in the sentences.
1)I am looking for a job for the last two weeks.
2)Nobody has seen Laura for last Sunday.
3)I haven't finished my article already.
4)He has ever tried joining an enviromental group.
5)We have been members of Greenpeace since three years.
6)Have you ever saw a zebra.

1 I've been looking for a job for last two month2 Nobody saw Laura  last Sunday.3 I haven't finished my article yet4 He hasn't ever tried joining an enviromental group.5 We have been members of Greenpeace for three years.6 Have you ever seen a zebra.