| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [art] | 2786 |
|
| 2 | could [not/n't] [verb] [det] | 1124 |
|
| 3 | [not/n't] [verb] [art] [det] | 736 |
|
| 4 | could [verb] [art] [det] | 270 |
|
