how long is it since you last saw him?是什麼时态

how long is it since you last saw her? (How long ago) is it that you last saw her? it's a long time since i last saw you It's a long time since i saw you last. How long( )you last saw her?A.was it when B.is it after C.is how are you?it is a long time since we touched last time,now it's a long time since i last saw you这句话有错误么 It has been a long time since i saw you last time. it is a long time since l last saw you__________ 为什么填at Mrs. —How long have you had the bike?—Since last week什么时态 how long is it since you went to the seaside? how have you been since l saw you last