| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] could [pron] [vb infin] [verb] | 36 |
|
| 2 | could [pron] [vb infin] [conj] [verb] | 34 |
|
| 3 | [Wh det] could [vb infin] [conj] [verb] | 15 |
|
| 4 | [Wh det] could [pron] [vb infin] [conj] | 12 |
|
