| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [conj] [verb] [art] | 110 |
|
| 2 | [Wh det] could [vb infin] [verb] [art] | 40 |
|
| 3 | [Wh det] could [vb infin] [conj] [verb] | 15 |
|
| 4 | [Wh det] could [vb infin] [conj] [art] | 14 |
|
