3 1 for 2 since 3 since 4 for 5 since 6 for
4 1 how long he has studied english? He has studied english since 2002
2 how long she has designed website? She has designed website for a long time
3 how long you have live in Russia? I have lived in Russia since was born
4 how long they have known each other? They have known each other for three years
5 how long he has worked in a shop? He has worked in a shop since he left school