| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] at the | 15 |
|
| 2 | could [not/n't] [verb] at the | 15 |
|
| 3 | could [not/n't] [verb] at the | 15 |
|
| 4 | could n't [verb] at the | 8 |
|
| 5 | could not [verb] at the | 7 |
|
