| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [be] [verb] to [be] | 124 |
|
| 2 | [vb mod] [not/n't] [be] [verb] to [be] | 124 |
|
| 3 | could [adv] [be] [verb] to [be] | 44 |
|
| 4 | could [not/n't] [be] [verb] [prep] [be] | 19 |
|
| 5 | could [not/n't] [be] [verb] [prep] [be] | 19 |
|
| 6 | could [not/n't] [be] [verb] to [be] | 18 |
|
| 7 | could [not/n't] [be] [verb] to [be] | 18 |
|
