| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [to-vb] [adv] | 4040 |
|
| 2 | could [vb infin] [adv] | 3625 |
|
| 3 | could [vb infin] [to-vb] | 1359 |
|
