| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] could [vb infin] [adv] | 544 |
|
| 2 | [noun pl] could [vb infin] a | 261 |
|
| 3 | could [vb infin] a [adv] | 148 |
|
| 4 | [noun pl] [vb infin] a [adv] | 11 |
|
