| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [vb infin] [be] | 1104 |
|
| 2 | could not [vb infin] [be] | 369 |
|
| 3 | [adv] not [vb infin] [be] | 39 |
|
| 4 | could [adv] not [vb infin] | 30 |
|
| 5 | could [adv] not [be] | 15 |
|
