1. have never met
2. has just gone
3. has helped
4. Have you ever visited
5. hasn't seen
1. ever
2. already
3. ever
4. yet
5. just
1. I haven't eaten much for breakfast today
Have you eaten much for breakfast today?
2. Mary hasn't gone out yet
Has Mary gone out already?
3. We haven't traveled much this month
Have we traveled much this month?