| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [pron] could [vb infin] | 3789 |
|
| 2 | [pron] could [vb infin] a | 2931 |
|
| 3 | [adv] [pron] [vb infin] a | 395 |
|
| 4 | [adv] could [vb infin] a | 46 |
|
