| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [verb] | 12359 |
|
| 2 | [modal v] n't help | 1151 |
|
| 3 | could [adv] help | 772 |
|
| 4 | could not help | 712 |
|
| 5 | could [not/n't] help | 712 |
|
