| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] what [modal v] to be | 6 |
|
| 2 | [v-ing] what [vb mod] to be | 6 |
|
| 3 | [v-ing] what used to be | 5 |
|
| 4 | [v-ing] what used to be | 5 |
|
