| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb mod] to | 325 |
|
| 2 | [Wh det] used to | 210 |
|
| 3 | what [vb mod] to | 187 |
|
| 4 | which [vb mod] to | 138 |
|
| 5 | [Wh det] ought to | 108 |
|
