| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] used to | 86 |
|
| 2 | [prep] [Wh det] used to | 86 |
|
| 3 | of [Wh det] [modal v] to | 33 |
|
| 4 | of [pron] used to | 32 |
|
| 5 | of [Wh det] used [prep] | 28 |
|
| 6 | of [Wh det] used to | 28 |
|
