| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [not/n't] [be] [prep] | 1147 |
|
| 2 | could [adv] [be] [prep] | 174 |
|
| 3 | could [not/n't] [be] [prep] | 52 |
|
| 4 | could [not/n't] [be] [prep] | 52 |
|
