| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] it have been [v-ing] | 15 |
|
| 2 | which it have been [v-ing] | 12 |
|
| 3 | which it have been [v-ing] | 12 |
|
| 4 | [pron] it has been [v-ing] | 7 |
|
| 5 | [pron] it had been [v-ing] | 6 |
|
