| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb mod] to | 752 |
|
| 2 | it [modal v] to | 752 |
|
| 3 | it used to | 542 |
|
| 4 | it used to | 542 |
|
| 5 | it ought to | 188 |
|
| 6 | it ought to | 188 |
|
| 7 | it would to | 6 |
|
| 8 | it would to | 6 |
|
