| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [Wh det] used to [be] | 16 |
|
| 2 | [verb] [Wh det] used to be | 16 |
|
| 3 | [verb] [Wh det] used to [be] | 16 |
|
| 4 | [verb] [Wh det] used to be | 16 |
|
| 5 | [verb] what used to [be] | 15 |
|
| 6 | [v-ing] [Wh det] used to [be] | 5 |
|
