| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] used to | 317 |
|
| 2 | [Wh det] used to | 210 |
|
| 3 | [noun sg] [Wh det] to | 103 |
|
| 4 | [noun sg] [Wh det] used | 51 |
|
