| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [be] [verb] [prep] | 894 |
|
| 2 | could [not/n't] [be] [verb] [prep] | 894 |
|
| 3 | [modal v] [not/n't] [be] [verb] to | 813 |
|
| 4 | could [adv] [be] [verb] to | 237 |
|
| 5 | could [not/n't] [be] [verb] to | 90 |
|
