| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] [pron] could [vb infin] [noun] | 385 |
|
| 2 | [vb past] [subord] [pron] could [vb infin] | 309 |
|
| 3 | [vb past] [pron] could [vb infin] [noun] | 107 |
|
