| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] could be [vb pp] [prep] | 3963 |
|
| 2 | could be [vb pp] [vb pp] [prep] | 13 |
|
| 3 | [noun] could be [vb pp] [vb pp] | 12 |
|
