| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [pron] used to [be] | 133 |
|
| 2 | [coord] what [modal v] to [be] | 11 |
|
| 3 | [coord] [Wh det] used to [be] | 9 |
|
| 4 | [conj] what used to [be] | 9 |
|
| 5 | [coord] what used to [be] | 7 |
|
| 6 | [coord] what used [prep] [be] | 7 |
|
| 7 | [coord] what used to [be] | 7 |
|
| 8 | [coord] what used [prep] [be] | 7 |
|
