| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] to | 351 |
|
| 2 | could [not/n't] [vb infin] [adj] | 331 |
|
| 3 | [not/n't] [vb infin] to [adj] | 289 |
|
| 4 | could [vb infin] to [adj] | 167 |
|
