| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [prep] [prep] | 512 |
|
| 2 | could [vb infin] [prep] [prep] | 77 |
|
| 3 | could [vb infin] [prep] [prep] | 77 |
|
| 4 | could [verb] [prep] [prep] | 77 |
|
