| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [pers pn] have been [v-ing] | 403 |
|
| 2 | [prep] what [pers pn] have been | 192 |
|
| 3 | [prep] what have been [v-ing] | 67 |
|
| 4 | [prep] [pers pn] have been [v-ing] | 58 |
|
