| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb base] been | 1239 |
|
| 2 | who [vb base] [been] | 1239 |
|
| 3 | who have [been] | 1049 |
|
| 4 | who 've [been] | 190 |
|
