| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] could [vb infin] [noun] | 253 |
|
| 2 | [conj] could [vb infin] [adv] | 134 |
|
| 3 | could [vb infin] [adv] [noun] | 96 |
|
| 4 | [conj] [vb infin] [adv] [noun] | 32 |
|
