| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have [been] [verb] | 6114 |
|
| 2 | [pron] have [been] [to-vb] | 162 |
|
| 3 | it have [be] [to-vb] | 30 |
|
| 4 | it [verb] [been] [to-vb] | 30 |
|
