| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what used to [be] | 86 |
|
| 2 | [prep] what used to [be] | 86 |
|
| 3 | of what [modal v] to [be] | 33 |
|
| 4 | of [pron] used to [be] | 32 |
|
| 5 | of what used to [be] | 28 |
|
| 6 | of what used to [be] | 28 |
|
| 7 | of what used to [be] | 28 |
|
| 8 | of what used [prep] [be] | 28 |
|
| 9 | of [Wh det] used to [be] | 28 |
|
| 10 | of what used to [be] | 28 |
|
| 11 | of what used [prep] [be] | 28 |
|
