| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [prep] | 9783 |
|
| 2 | could [vb infin] [prep] | 9758 |
|
| 3 | [verb] [vb infin] [prep] | 4462 |
|
| 4 | could [verb] [vb infin] | 120 |
|
