| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] n't [verb] [det] | 4441 |
|
| 2 | could [adv] [verb] [det] | 1574 |
|
| 3 | could [not/n't] [verb] [det] | 1124 |
|
| 4 | could not [verb] [det] | 1123 |
|
| 5 | could n't [verb] [adj] | 932 |
|
