| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] [noun sg] to | 20 |
|
| 2 | could [not/n't] [verb] [noun sg] to | 20 |
|
| 3 | could not [verb] [noun sg] to | 13 |
|
| 4 | could n't [verb] [noun sg] to | 7 |
|
