| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [pers pn] have been [v-ing] | 403 |
|
| 2 | [vb past] [pers pn] have been [v-ing] | 172 |
|
| 3 | [vb past] what [pers pn] have been | 27 |
|
| 4 | [vb past] what have been [v-ing] | 5 |
|
