| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [pers pn] have been [v-ing] | 403 |
|
| 2 | [is] what [pers pn] have been | 86 |
|
| 3 | [is] what have been [v-ing] | 10 |
|
| 4 | [is] [pers pn] have been [v-ing] | 6 |
|
