| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [pers pn] have been [v-ing] | 403 |
|
| 2 | [to-vb] what [pers pn] have been | 34 |
|
| 3 | [to-vb] [pers pn] have been [v-ing] | 14 |
|
| 4 | [to-vb] what have been [v-ing] | 6 |
|
