| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [pron] [prep] | 550 |
|
| 2 | could [not/n't] [verb] [pron] [prep] | 550 |
|
| 3 | [modal v] [not/n't] [verb] [pron] at | 189 |
|
| 4 | could [adv] [verb] [pron] at | 70 |
|
| 5 | could [not/n't] [verb] [pron] at | 57 |
|
