| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [prep] | 2122 |
|
| 2 | [vb mod] [not/n't] [verb] for | 1081 |
|
| 3 | [modal v] [not/n't] [verb] for | 1081 |
|
| 4 | could [adv] [verb] for | 352 |
|
| 5 | could [not/n't] [verb] for | 203 |
|
