| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] [to-vb] [det] | 2625 |
|
| 2 | could [vb infin] [verb] [det] | 452 |
|
| 3 | could [vb infin] [to-vb] [adj] | 129 |
|
| 4 | could [verb] [to-vb] [det] | 77 |
|
