| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [modal v] [vb infin] [prep] [be] | 321 |
|
| 2 | [adj] could [vb infin] [prep] [be] | 9 |
|
| 3 | [det] could [vb infin] [prep] [be] | 7 |
|
| 4 | [det] could [verb] [prep] [be] | 7 |
|
