| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] could [be] [vb pp] [prep] | 402 |
|
| 2 | could [be] [vb pp] [prep] be | 148 |
|
| 3 | [det] [be] [vb pp] [prep] be | 8 |
|
