| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [vb infin] been [prep] | 229 |
|
| 2 | it [modal v] [vb infin] been [prep] | 229 |
|
| 3 | [pron] may [vb infin] been [prep] | 61 |
|
| 4 | it may [vb infin] [be] [prep] | 27 |
|
| 5 | it may [vb infin] be [prep] | 27 |
|
| 6 | it may [vb infin] [been] [prep] | 26 |
|
| 7 | it may [verb] been [prep] | 26 |
|
| 8 | it may [vb infin] been [prep] | 26 |
|
