| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] i [vb infin] [det] | 672 |
|
| 2 | could [pron] [vb infin] [det] | 320 |
|
| 3 | could i [vb infin] [adj] | 58 |
|
| 4 | could i [verb] [det] | 45 |
|
