| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [pron] [adj] [noun] | 569 |
|
| 2 | [modal v] [vb infin] i [adj] [noun] | 136 |
|
| 3 | could [verb] i [adj] [noun] | 17 |
|
