| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] used to be know | 7 |
|
| 2 | [prep] what used to [be] know | 7 |
|
| 3 | [prep] [Wh det] used to [be] know | 7 |
|
| 4 | [prep] [Wh det] used to [be] known | 7 |
|
| 5 | [prep] [Wh det] used to [be] know | 7 |
|
| 6 | [prep] [Wh det] used to be know | 7 |
|
