| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [adv] [conj] | 48 |
|
| 2 | [vb mod] [not/n't] [adv] [conj] | 48 |
|
| 3 | could [adv] [adv] [conj] | 12 |
|
| 4 | could [not/n't] [adv] [conj] | 7 |
|
