| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] be to have been | 44 |
|
| 2 | [pers pn] be to have been | 12 |
|
| 3 | it be have been | 9 |
|
| 4 | it be [verb] been | 9 |
|
| 5 | it be to have [be] | 7 |
|
| 6 | it be to have be | 7 |
|
| 7 | it be to have been | 7 |
|
| 8 | it be to have [been] | 7 |
|
| 9 | it [be] to have been | 7 |
|
| 10 | it be [to-vb] been | 7 |
|
