| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [vb infin] | 45138 |
|
| 2 | could [not/n't] [vb infin] | 21338 |
|
| 3 | [pron] could [not/n't] | 17946 |
|
| 4 | [pron] [not/n't] [vb infin] | 1063 |
|
