| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [adv] [vb infin] a [noun sg] | 3142 |
|
| 2 | could [adv] [vb infin] [art] [noun sg] | 1121 |
|
| 3 | could [adv] [vb infin] a [noun sg] | 1038 |
|
| 4 | could [adv] [vb infin] a [noun] | 439 |
|
| 5 | could [adv] [verb] a [noun sg] | 434 |
|
