| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [pers pn] have been [v-ing] | 403 |
|
| 2 | [be] what [pers pn] have been | 115 |
|
| 3 | [be] [pers pn] have been [v-ing] | 19 |
|
| 4 | [be] what have been [v-ing] | 11 |
|
