| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] [not/n't] [vb infin] | 4409 |
|
| 2 | it [vb mod] [vb infin] been | 3764 |
|
| 3 | [vb mod] [not/n't] [vb infin] been | 2106 |
|
| 4 | it [not/n't] [vb infin] been | 15 |
|
