| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could not [vb infin] [pron] [pron] | 291 |
|
| 2 | not [vb infin] [pron] [modal v] [pron] | 87 |
|
| 3 | could not [vb infin] [pron] [modal v] | 44 |
|
