| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what used to [be] a | 5 |
|
| 2 | [prep] what used to [be] a | 5 |
|
| 3 | what used to [be] a [adj] | 6 |
|
| 4 | what used to [be] a [adj] | 6 |
|
