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