| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [be] [adv] [verb] [conj] | 111 |
|
| 2 | could [adv] [be] [adv] [verb] [conj] | 16 |
|
| 3 | could [not/n't] [be] [adv] [verb] [conj] | 8 |
|
