| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] not [be] [vb pp] [prep] [noun] | 1281 |
|
| 2 | could [adv] [be] [vb pp] [prep] [noun] | 468 |
|
| 3 | could not [be] [vb pp] [prep] [noun] | 185 |
|
| 4 | could [not/n't] [be] [vb pp] [prep] [noun] | 185 |
|
| 5 | could not [be] [verb] [prep] [noun] | 171 |
|
