| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] they [vb mod] to | 33 |
|
| 2 | what they [modal v] to | 31 |
|
| 3 | [Wh det] they used to | 23 |
|
| 4 | [Wh det] they used to | 23 |
|
| 5 | [Wh det] they ought to | 10 |
|
| 6 | [Wh det] they ought to | 10 |
|
