| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] | 21338 |
|
| 2 | [noun prp] could [vb infin] | 3762 |
|
| 3 | [noun prp] could [not/n't] | 1710 |
|
| 4 | [noun prp] [not/n't] [vb infin] | 31 |
|
