| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [pron] | 865 |
|
| 2 | n't [pron] [prep] | 447 |
|
| 3 | could n't [prep] | 81 |
|
| 4 | could [pron] [prep] | 34 |
|
