| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] could [vb infin] [prep] | 432 |
|
| 2 | could [vb infin] [be] [prep] | 114 |
|
| 3 | [noun prp] could [vb infin] [be] | 103 |
|
| 4 | [noun prp] could [be] [prep] | 49 |
|
