| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [vb infin] [pron] at the | 16 |
|
| 2 | could [not/n't] [verb] [pers pn] at the | 13 |
|
| 3 | could n't [verb] [pron] at the | 13 |
|
| 4 | could [not/n't] [verb] it at the | 8 |
|
| 5 | could [not/n't] [verb] it at the | 8 |
|
