| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could not be | 711 |
|
| 2 | [pron] could be [prep] | 381 |
|
| 3 | [pron] could not [prep] | 41 |
|
| 4 | could not be [prep] | 24 |
|
| 5 | [pron] not be [prep] | 9 |
|
