| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [pron] [verb] at [art] | 7 |
|
| 2 | could [vb infin] [pron] [verb] at [art] | 7 |
|
| 3 | could [pron] [verb] at [art] [noun sg] | 6 |
|
| 4 | could [pron] [verb] at [art] [noun] | 6 |
|
