| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who [vb base] [not/n't] been [prep] | 10 |
|
| 2 | who [vb base] [not/n't] [been] [prep] | 10 |
|
| 3 | who have [not/n't] [been] [prep] | 9 |
|
| 4 | who [vb base] not [been] [prep] | 7 |
|
