| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb base] [been] on | 30 |
|
| 2 | who [vb base] been on | 30 |
|
| 3 | who [vb base] [been] on | 30 |
|
| 4 | who have [been] on | 21 |
|
| 5 | who 've [been] on | 9 |
|
