| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could [vb infin] | 2635 |
|
| 2 | [adv] could [vb infin] | 661 |
|
| 3 | [adv] it could | 515 |
|
| 4 | [adv] it [vb infin] | 221 |
|
