| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [adv] have been [that] | 7 |
|
| 2 | it [vb mod] [adv] have been that | 7 |
|
| 3 | it [vb mod] [adv] have been [that] | 7 |
|
| 4 | it may [adv] have been [that] | 6 |
|
