| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [modal v] [vb infin] be [vb pp] [prep] | 249 |
|
| 2 | [conj] could [vb infin] be [verb] [prep] | 46 |
|
| 3 | [conj] could [vb infin] [be] [vb pp] [prep] | 45 |
|
| 4 | [conj] could [verb] be [vb pp] [prep] | 45 |
|
