| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] for [det] [noun] | 28 |
|
| 2 | could [verb] for [det] [noun sg] | 16 |
|
| 3 | could [verb] for [det] [noun pl] | 12 |
|
| 4 | could [verb] for this [noun] | 6 |
|
