| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [be] [vb pp] [prep] | 1303 |
|
| 2 | [adv] [be] [vb pp] [prep] be | 201 |
|
| 3 | could [be] [vb pp] [prep] be | 148 |
|
