| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could not be [verb] | 177 |
|
| 2 | it could not be [vb pp] | 176 |
|
| 3 | [pron] could not be seen | 22 |
|
| 4 | it [modal v] not be seen | 20 |
|
| 5 | it [vb mod] not be seen | 20 |
|
| 6 | it could [adv] be seen | 12 |
|
| 7 | it could not be seen | 5 |
|
| 8 | it could not [be] seen | 5 |
|
| 9 | it could not be see | 5 |
|
