| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [vb infin] [pron] [noun] | 3189 |
|
| 2 | could [adv] [vb infin] [pron] [noun] | 1406 |
|
| 3 | could [not/n't] [verb] [pron] [noun] | 903 |
|
