| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [prep] | 9758 |
|
| 2 | [det] could [vb infin] | 1312 |
|
| 3 | [det] [vb infin] [prep] | 948 |
|
| 4 | [det] could [prep] | 24 |
|
