| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [verb] [adj] | 714 |
|
| 2 | [modal v] [vb infin] [vb infin] [adj] | 152 |
|
| 3 | could [verb] [vb infin] [adj] | 16 |
|
