| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [modal v] [vb infin] [prep] [be] | 545 |
|
| 2 | [pron] could [vb infin] [prep] [be] | 167 |
|
| 3 | it could [verb] [prep] [be] | 7 |
|
| 4 | it could [vb infin] [prep] [be] | 7 |
|
