| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [vb infin] | 2647 |
|
| 2 | it could [vb infin] | 2635 |
|
| 3 | [verb] could [vb infin] | 339 |
|
| 4 | it [verb] could | 18 |
|
