| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [vb infin] | 21316 |
|
| 2 | [det] could [vb infin] | 1312 |
|
| 3 | [det] could not | 235 |
|
| 4 | [det] not [vb infin] | 35 |
|
