| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] have [been] | 3771 |
|
| 2 | [vb mod] have [been] [adv] | 2829 |
|
| 3 | it have [been] [adv] | 1171 |
|
| 4 | it [vb mod] have [adv] | 93 |
|
