| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] could [vb infin] | 19151 |
|
| 2 | could not [vb infin] | 8968 |
|
| 3 | [noun] could not | 4359 |
|
| 4 | [noun] not [vb infin] | 114 |
|
