| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] [det] | 1124 |
|
| 2 | could [pers pn] [verb] [det] | 310 |
|
| 3 | [pers pn] [not/n't] [verb] [det] | 185 |
|
| 4 | could [pers pn] [not/n't] [verb] | 103 |
|
