| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [verb] or [vb infin] | 433 |
|
| 2 | could [verb] or [vb infin] | 111 |
|
| 3 | could not [verb] or | 37 |
|
| 4 | could not [verb] [vb infin] | 5 |
|
