| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [verb] | 7453 |
|
| 2 | [vb mod] [vb infin] [vb infin] | 1098 |
|
| 3 | [modal v] [vb infin] [vb infin] | 1098 |
|
| 4 | could [verb] [vb infin] | 120 |
|
| 5 | could [vb infin] [vb infin] | 118 |
|
