| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] it [vb mod] to | 19 |
|
| 2 | [Wh adv] it [modal v] to | 19 |
|
| 3 | [Wh adv] it used to | 13 |
|
| 4 | [Wh adv] it used to | 13 |
|
| 5 | how it [modal v] to | 12 |
|
| 6 | [Wh adv] it ought to | 6 |
|
| 7 | [Wh adv] it ought to | 6 |
|
| 8 | where it [modal v] to | 6 |
|
