| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] could [vb infin] [vb pp] a | 166 |
|
| 2 | [pers pn] could [vb infin] a [adj -er] | 53 |
|
| 3 | could [vb infin] [vb pp] a [adj -er] | 18 |
|
